diff --git a/CHANGELOG.md b/CHANGELOG.md
index 25676179..bf84f794 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -103,6 +103,8 @@
   filesystem.Serve(res, req, e.ServedPath, e.ServedName)
   ```
 
+- Fixed concurrent multi-relation cascade update/delete ([#1138](https://github.com/pocketbase/pocketbase/issues/1138)).
+
 
 ## v0.8.0
 
diff --git a/plugins/migratecmd/automigrate.go b/plugins/migratecmd/automigrate.go
index cbb56874..a31ef3f2 100644
--- a/plugins/migratecmd/automigrate.go
+++ b/plugins/migratecmd/automigrate.go
@@ -6,13 +6,10 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
-	"sort"
 	"time"
 
 	"github.com/pocketbase/pocketbase/core"
-	m "github.com/pocketbase/pocketbase/migrations"
 	"github.com/pocketbase/pocketbase/models"
-	"github.com/pocketbase/pocketbase/tools/list"
 )
 
 const collectionsCacheKey = "migratecmd_collections"
@@ -31,7 +28,7 @@ func (p *plugin) afterCollectionChange() func(*core.ModelEvent) error {
 			return err
 		}
 
-		old, _ := oldCollections[e.Model.GetId()]
+		old := oldCollections[e.Model.GetId()]
 
 		new, err := p.app.Dao().FindCollectionByNameOrId(e.Model.GetId())
 		if err != nil && !errors.Is(err, sql.ErrNoRows) {
@@ -108,53 +105,3 @@ func (p *plugin) getCachedCollections() (map[string]*models.Collection, error) {
 
 	return result, nil
 }
-
-// getAllMigrationNames return sorted slice with both applied and new
-// local migration file names.
-func (p *plugin) getAllMigrationNames() ([]string, error) {
-	names := []string{}
-
-	for _, migration := range m.AppMigrations.Items() {
-		names = append(names, migration.File)
-	}
-
-	localFiles, err := p.getLocalMigrationNames()
-	if err != nil {
-		return nil, err
-	}
-	for _, name := range localFiles {
-		if !list.ExistInSlice(name, names) {
-			names = append(names, name)
-		}
-	}
-
-	sort.Slice(names, func(i int, j int) bool {
-		return names[i] < names[j]
-	})
-
-	return names, nil
-}
-
-// getLocalMigrationNames returns a list with all local migration files
-//
-// Returns an empty slice if the migrations directory doesn't exist.
-func (p *plugin) getLocalMigrationNames() ([]string, error) {
-	files, err := os.ReadDir(p.options.Dir)
-	if err != nil {
-		if os.IsNotExist(err) {
-			return []string{}, nil
-		}
-		return nil, err
-	}
-
-	result := make([]string, 0, len(files))
-
-	for _, f := range files {
-		if f.IsDir() {
-			continue
-		}
-		result = append(result, f.Name())
-	}
-
-	return result, nil
-}
diff --git a/plugins/migratecmd/templates.go b/plugins/migratecmd/templates.go
index 26265278..7665bf16 100644
--- a/plugins/migratecmd/templates.go
+++ b/plugins/migratecmd/templates.go
@@ -720,7 +720,7 @@ func marhshalWithoutEscape(v any, prefix string, indent string) ([]byte, error)
 	}
 
 	// unescape escaped unicode characters
-	unescaped, err := strconv.Unquote(strings.Replace(strconv.Quote(string(raw)), `\\u`, `\u`, -1))
+	unescaped, err := strconv.Unquote(strings.ReplaceAll(strconv.Quote(string(raw)), `\\u`, `\u`))
 	if err != nil {
 		return nil, err
 	}