diff --git a/cmd/cc-backend/main.go b/cmd/cc-backend/main.go
index e956503..991fe6b 100644
--- a/cmd/cc-backend/main.go
+++ b/cmd/cc-backend/main.go
@@ -134,7 +134,7 @@ func initEnv() {
 }
 
 func main() {
-	var flagReinitDB, flagInit, flagServer, flagSyncLDAP, flagGops, flagMigrateDB, flagDev, flagVersion, flagLogDateTime bool
+	var flagReinitDB, flagInit, flagServer, flagSyncLDAP, flagGops, flagMigrateDB, flagRevertDB, flagForceDB, flagDev, flagVersion, flagLogDateTime bool
 	var flagNewUser, flagDelUser, flagGenJWT, flagConfigFile, flagImportJob, flagLogLevel string
 	flag.BoolVar(&flagInit, "init", false, "Setup var directory, initialize swlite database file, config.json and .env")
 	flag.BoolVar(&flagReinitDB, "init-db", false, "Go through job-archive and re-initialize the 'job', 'tag', and 'jobtag' tables (all running jobs will be lost!)")
@@ -144,6 +144,8 @@ func main() {
 	flag.BoolVar(&flagDev, "dev", false, "Enable development components: GraphQL Playground and Swagger UI")
 	flag.BoolVar(&flagVersion, "version", false, "Show version information and exit")
 	flag.BoolVar(&flagMigrateDB, "migrate-db", false, "Migrate database to supported version and exit")
+	flag.BoolVar(&flagRevertDB, "revert-db", false, "Migrate database to previous version and exit")
+	flag.BoolVar(&flagForceDB, "force-db", false, "Force database version, clear dirty flag and exit")
 	flag.BoolVar(&flagLogDateTime, "logdate", false, "Set this flag to add date and time to log messages")
 	flag.StringVar(&flagConfigFile, "config", "./config.json", "Specify alternative path to `config.json`")
 	flag.StringVar(&flagNewUser, "add-user", "", "Add a new user. Argument format: `<username>:[admin,support,manager,api,user]:<password>`")
@@ -205,6 +207,22 @@ func main() {
 		os.Exit(0)
 	}
 
+	if flagRevertDB {
+		err := repository.RevertDB(config.Keys.DBDriver, config.Keys.DB)
+		if err != nil {
+			log.Fatal(err)
+		}
+		os.Exit(0)
+	}
+
+	if flagForceDB {
+		err := repository.ForceDB(config.Keys.DBDriver, config.Keys.DB)
+		if err != nil {
+			log.Fatal(err)
+		}
+		os.Exit(0)
+	}
+
 	repository.Connect(config.Keys.DBDriver, config.Keys.DB)
 	db := repository.GetConnection()
 
diff --git a/internal/repository/job.go b/internal/repository/job.go
index ec20d98..0de871a 100644
--- a/internal/repository/job.go
+++ b/internal/repository/job.go
@@ -436,11 +436,14 @@ func (r *JobRepository) Stop(
 
 func (r *JobRepository) DeleteJobsBefore(startTime int64) (int, error) {
 	var cnt int
-	qs := fmt.Sprintf("SELECT count(*) FROM job WHERE job.start_time < %d", startTime)
-	err := r.DB.Get(&cnt, qs) // ignore error as it will also occur in delete statement
-	_, err = r.DB.Exec(`DELETE FROM job WHERE job.start_time < ?`, startTime)
+	q := sq.Select("count(*)").From("job").Where("job.start_time < ?", startTime)
+	q.RunWith(r.DB).QueryRow().Scan(cnt)
+	qd := sq.Delete("job").Where("job.start_time < ?", startTime)
+	_, err := qd.RunWith(r.DB).Exec()
+
 	if err != nil {
-		log.Errorf(" DeleteJobsBefore(%d): error %#v", startTime, err)
+		s, _, _ := qd.ToSql()
+		log.Errorf(" DeleteJobsBefore(%d) with %s: error %#v", startTime, s, err)
 	} else {
 		log.Debugf("DeleteJobsBefore(%d): Deleted %d jobs", startTime, cnt)
 	}
@@ -448,9 +451,12 @@ func (r *JobRepository) DeleteJobsBefore(startTime int64) (int, error) {
 }
 
 func (r *JobRepository) DeleteJobById(id int64) error {
-	_, err := r.DB.Exec(`DELETE FROM job WHERE job.id = ?`, id)
+	qd := sq.Delete("job").Where("job.id = ?", id)
+	_, err := qd.RunWith(r.DB).Exec()
+
 	if err != nil {
-		log.Errorf("DeleteJobById(%d): error %#v", id, err)
+		s, _, _ := qd.ToSql()
+		log.Errorf("DeleteJobById(%d) with %s : error %#v", id, s, err)
 	} else {
 		log.Debugf("DeleteJobById(%d): Success", id)
 	}
diff --git a/internal/repository/migration.go b/internal/repository/migration.go
index 0f37d0a..38a88f7 100644
--- a/internal/repository/migration.go
+++ b/internal/repository/migration.go
@@ -16,7 +16,7 @@ import (
 	"github.com/golang-migrate/migrate/v4/source/iofs"
 )
 
-const Version uint = 6
+const Version uint = 7
 
 //go:embed migrations/*
 var migrationFiles embed.FS
@@ -57,7 +57,7 @@ func checkDBVersion(backend string, db *sql.DB) error {
 		log.Fatalf("unsupported database backend: %s", backend)
 	}
 
-	v, _, err := m.Version()
+	v, dirty, err := m.Version()
 	if err != nil {
 		if err == migrate.ErrNilVersion {
 			log.Warn("Legacy database without version or missing database file!")
@@ -68,18 +68,18 @@ func checkDBVersion(backend string, db *sql.DB) error {
 
 	if v < Version {
 		return fmt.Errorf("unsupported database version %d, need %d.\nPlease backup your database file and run cc-backend -migrate-db", v, Version)
+	} else if v > Version {
+		return fmt.Errorf("unsupported database version %d, need %d.\nPlease refer to documentation how to downgrade db with external migrate tool", v, Version)
 	}
 
-	if v > Version {
-		return fmt.Errorf("unsupported database version %d, need %d.\nPlease refer to documentation how to downgrade db with external migrate tool", v, Version)
+	if dirty {
+		return fmt.Errorf("last migration to version %d has failed, please fix the db manually and force version with -force-db flag", Version)
 	}
 
 	return nil
 }
 
-func MigrateDB(backend string, db string) error {
-	var m *migrate.Migrate
-
+func getMigrateInstance(backend string, db string) (m *migrate.Migrate, err error) {
 	switch backend {
 	case "sqlite3":
 		d, err := iofs.New(migrationFiles, "migrations/sqlite3")
@@ -89,22 +89,31 @@ func MigrateDB(backend string, db string) error {
 
 		m, err = migrate.NewWithSourceInstance("iofs", d, fmt.Sprintf("sqlite3://%s?_foreign_keys=on", db))
 		if err != nil {
-			return err
+			return m, err
 		}
 	case "mysql":
 		d, err := iofs.New(migrationFiles, "migrations/mysql")
 		if err != nil {
-			return err
+			return m, err
 		}
 
 		m, err = migrate.NewWithSourceInstance("iofs", d, fmt.Sprintf("mysql://%s?multiStatements=true", db))
 		if err != nil {
-			return err
+			return m, err
 		}
 	default:
 		log.Fatalf("unsupported database backend: %s", backend)
 	}
 
+	return m, nil
+}
+
+func MigrateDB(backend string, db string) error {
+	m, err := getMigrateInstance(backend, db)
+	if err != nil {
+		return err
+	}
+
 	if err := m.Up(); err != nil {
 		if err == migrate.ErrNoChange {
 			log.Info("DB already up to date!")
@@ -116,3 +125,35 @@ func MigrateDB(backend string, db string) error {
 	m.Close()
 	return nil
 }
+
+func RevertDB(backend string, db string) error {
+	m, err := getMigrateInstance(backend, db)
+	if err != nil {
+		return err
+	}
+
+	if err := m.Migrate(Version - 1); err != nil {
+		if err == migrate.ErrNoChange {
+			log.Info("DB already up to date!")
+		} else {
+			return err
+		}
+	}
+
+	m.Close()
+	return nil
+}
+
+func ForceDB(backend string, db string) error {
+	m, err := getMigrateInstance(backend, db)
+	if err != nil {
+		return err
+	}
+
+	if err := m.Force(int(Version)); err != nil {
+		return err
+	}
+
+	m.Close()
+	return nil
+}
diff --git a/internal/repository/migrations/mysql/07_fix-tag-id.down.sql b/internal/repository/migrations/mysql/07_fix-tag-id.down.sql
new file mode 100644
index 0000000..4172f4e
--- /dev/null
+++ b/internal/repository/migrations/mysql/07_fix-tag-id.down.sql
@@ -0,0 +1 @@
+ALTER TABLE tag MODIFY id INTEGER;
diff --git a/internal/repository/migrations/mysql/07_fix-tag-id.up.sql b/internal/repository/migrations/mysql/07_fix-tag-id.up.sql
new file mode 100644
index 0000000..f8d805f
--- /dev/null
+++ b/internal/repository/migrations/mysql/07_fix-tag-id.up.sql
@@ -0,0 +1 @@
+ALTER TABLE tag MODIFY id INTEGER AUTO_INCREMENT;
diff --git a/internal/repository/migrations/sqlite3/07_fix-tag-id.down.sql b/internal/repository/migrations/sqlite3/07_fix-tag-id.down.sql
new file mode 100644
index 0000000..e69de29
diff --git a/internal/repository/migrations/sqlite3/07_fix-tag-id.up.sql b/internal/repository/migrations/sqlite3/07_fix-tag-id.up.sql
new file mode 100644
index 0000000..e69de29
diff --git a/internal/repository/tags.go b/internal/repository/tags.go
index 52bc836..e97bc65 100644
--- a/internal/repository/tags.go
+++ b/internal/repository/tags.go
@@ -15,8 +15,11 @@ import (
 
 // Add the tag with id `tagId` to the job with the database id `jobId`.
 func (r *JobRepository) AddTag(job int64, tag int64) ([]*schema.Tag, error) {
-	if _, err := r.stmtCache.Exec(`INSERT INTO jobtag (job_id, tag_id) VALUES ($1, $2)`, job, tag); err != nil {
-		log.Error("Error while running query")
+	q := sq.Insert("jobtag").Columns("job_id", "tag_id").Values(job, tag)
+
+	if _, err := q.RunWith(r.stmtCache).Exec(); err != nil {
+		s, _, _ := q.ToSql()
+		log.Errorf("Error adding tag with %s: %v", s, err)
 		return nil, err
 	}
 
@@ -37,8 +40,11 @@ func (r *JobRepository) AddTag(job int64, tag int64) ([]*schema.Tag, error) {
 
 // Removes a tag from a job
 func (r *JobRepository) RemoveTag(job, tag int64) ([]*schema.Tag, error) {
-	if _, err := r.stmtCache.Exec("DELETE FROM jobtag WHERE jobtag.job_id = $1 AND jobtag.tag_id = $2", job, tag); err != nil {
-		log.Error("Error while running query")
+	q := sq.Delete("jobtag").Where("jobtag.job_id = ?", job).Where("jobtag.tag_id = ?", tag)
+
+	if _, err := q.RunWith(r.stmtCache).Exec(); err != nil {
+		s, _, _ := q.ToSql()
+		log.Errorf("Error adding tag with %s: %v", s, err)
 		return nil, err
 	}
 
@@ -59,8 +65,12 @@ func (r *JobRepository) RemoveTag(job, tag int64) ([]*schema.Tag, error) {
 
 // CreateTag creates a new tag with the specified type and name and returns its database id.
 func (r *JobRepository) CreateTag(tagType string, tagName string) (tagId int64, err error) {
-	res, err := r.stmtCache.Exec("INSERT INTO tag (tag_type, tag_name) VALUES ($1, $2)", tagType, tagName)
+	q := sq.Insert("tag").Columns("tag_type", "tag_name").Values(tagType, tagName)
+
+	res, err := q.RunWith(r.stmtCache).Exec()
 	if err != nil {
+		s, _, _ := q.ToSql()
+		log.Errorf("Error inserting tag with %s: %v", s, err)
 		return 0, err
 	}
 
@@ -154,7 +164,8 @@ func (r *JobRepository) GetTags(job *int64) ([]*schema.Tag, error) {
 
 	rows, err := q.RunWith(r.stmtCache).Query()
 	if err != nil {
-		log.Error("Error while running query")
+		s, _, _ := q.ToSql()
+		log.Errorf("Error get tags with %s: %v", s, err)
 		return nil, err
 	}