Alerting: Fix migration (#53253)

pkg/services/sqlstore/migrations/ualert/permissions.go

@@ -45,6 +45,8 @@ type dashboardACL struct {
 	Updated time.Time
 }
 
+func (p dashboardACL) TableName() string { return "dashboard_acl" }
+
 type folderHelper struct {
 	sess *xorm.Session
 	mg   *migrator.Migrator

pkg/services/sqlstore/migrations/ualert/ualert.go

@@ -315,7 +315,7 @@ func (m *migration) Exec(sess *xorm.Session, mg *migrator.Migrator) error {
 				err = folderHelper.setACL(f.OrgId, f.Id, permissions)
 				if err != nil {
 					return MigrationError{
-						Err:     fmt.Errorf("failed to set folder %d under organisation %d permissions: %w", folder.Id, folder.OrgId, err),
+						Err:     fmt.Errorf("failed to set folder %d under organisation %d permissions: %w", f.Id, f.OrgId, err),
 						AlertId: da.Id,
 					}
 				}