Repair a Multiverse portal destination after a target world is renamed

A portal can retain a destination string that no longer matches the managed world name. An alias change and a real world rename are different events. Trace the stored target before creating replacement worlds or overwriting the original destination folder.
Work through the change
Record the portal name and complete destination string. Compare the target with Multiverse’s current world list, including aliases and the names used by other portals.
Confirm that the intended world data exists and is loaded under the expected identity. If the saved world is unavailable, stop and locate it rather than generating a new world with a similar name.
Use the documented portal modification command to change the single stale reference. Preserve any coordinate or facing part of the destination only after verifying it belongs to the same map.
Test the repaired route with an ordinary account and then test its return route. Inspect menus or other portals that refer to the same old world name without performing an unreviewed global text replacement.
Check the result
The route should reach the existing intended map with its builds intact. Check a landmark and the world identity, not just a successful teleport response. If the destination was another portal, repair that portal reference instead of changing the world portion of an unrelated exact-position string.
Check all references to the old internal world name before reopening the portal. An attractive display alias is insufficient if an action still names the former folder. Keep the old destination text in the change record so recovery restores the precise route rather than a guessed equivalent.
Recover or stop safely
Restore the previous destination string if the trial reaches the wrong area and keep the route closed to regular players. Recover any missing world reference through its saved configuration or backup. Reinstalling the server is not required to correct one stale portal target.
Related guidance and maintainer reference
For the broader setup, read Create a controlled Multiverse-Portal between worlds. Check the installed plugin version before applying syntax from the official Multiverse-Portals documentation.