Manic shows up as "null" in layerHistory

[MerreM]

Description of Issue

Layer history most (all?) manic layers show up as "null" - breaking a mapvote plugin feature.

Errors or Screenshots of Issue

layerHistory.json

See [1].

Squad Information

• SquadJS Version:4.0.1
• Squad Version:Latest (7.1.1?)

If potentially relevant, please provide regarding the state of the Squad server at the time of error, e.g. the current layer.

System Information

• Operating System: Linux

• NodeJS Version: 15 ish?

• Yarn Version:

[fantinodavide]

very likely to have been caused by nomeclature changes by OWI and dependant on the (Squad Wiki layer list)[https://github.com/Squad-Wiki/squad-wiki-pipeline-map-data/]