Remove routes without a node_id

The routes table has a NOT NULL constraint on node_id.

Fixes: #2376

CHANGELOG.md

@@ -13,6 +13,8 @@
 
 - Fix issue where email and username being equal fails to match in Policy
   [#2388](https://github.com/juanfont/headscale/pull/2388)
+- Delete invalid routes before adding a NOT NULL constraint on node_id
+  [#2386](https://github.com/juanfont/headscale/pull/2386)
 
 ## 0.24.1 (2025-01-23)
 

hscontrol/db/db.go

@@ -565,6 +565,14 @@ COMMIT;
 						}
 					}
 
+					// Remove any invalid routes without a node_id.
+					if tx.Migrator().HasTable(&types.Route{}) {
+						err := tx.Exec("delete from routes where node_id is null").Error
+						if err != nil {
+							return err
+						}
+					}
+
 					err := tx.AutoMigrate(&types.Route{})
 					if err != nil {
 						return err