[OPEN] Can't delete areas on maps cloned

Bug Report
Expected behavior
When you clone a old map created originally on Silverlight to enchance/modify it with the features of HTML5 editor, i expect to be able to delete/undelete countries, areas and borders on it freely.

Actual behavior
When you try to modify a map which you cloned from an old one made on the old SL editor, it gives a lot of random error, and one of the most noticeable is the apparent inability to delete for real borders. Apparently it deletes and gives an error code, if you then draw new country it shows on the map preview but never on the editor.

Steps to reproduce the behavior
Clone an old map (made before the HTML5 editor where implemented), delete a country, try to draw new countries on it and those new countries will never show, instead giving a lot of random message error warnings.

Information:
Browser: N/A

Browser version: N/A

OS: N/A

Any other relevant information: N/A

Attachments:

Code given by map maker when deleting borders from an old map:



New borders apparently saved and showing on the map preview:



You open the map for edit and the new borders aren't showing, but the countries you made and save are showing:



Also, if u try to delete another country, you have random error mesages:

Note to self, see maps: 13151,13284,14663,15165,25583,28424
Cloned 'GGG Part 4: Alternate 7 Years War' (13284) into '2022-02-27 test2'