diff --git a/models/auth/auth_token.go b/models/auth/auth_token.go
index 8955b57a4f..c64af3e41f 100644
--- a/models/auth/auth_token.go
+++ b/models/auth/auth_token.go
@@ -39,7 +39,7 @@ type AuthorizationToken struct {
 	UID             int64  `xorm:"INDEX"`
 	LookupKey       string `xorm:"INDEX UNIQUE"`
 	HashedValidator string
-	Purpose         AuthorizationPurpose `xorm:"NOT NULL"`
+	Purpose         AuthorizationPurpose `xorm:"NOT NULL DEFAULT 'long_term_authorization'"`
 	Expiry          timeutil.TimeStamp
 }
 
diff --git a/models/forgejo_migrations/v24.go b/models/forgejo_migrations/v24.go
index 8c751e3f5f..ebfb5fc1c4 100644
--- a/models/forgejo_migrations/v24.go
+++ b/models/forgejo_migrations/v24.go
@@ -8,7 +8,7 @@ import "xorm.io/xorm"
 func AddPurposeToForgejoAuthToken(x *xorm.Engine) error {
 	type ForgejoAuthToken struct {
 		ID      int64  `xorm:"pk autoincr"`
-		Purpose string `xorm:"NOT NULL"`
+		Purpose string `xorm:"NOT NULL DEFAULT 'long_term_authorization'"`
 	}
 	if err := x.Sync(new(ForgejoAuthToken)); err != nil {
 		return err