Issue description:

Exception when migrating from Mekanica 1.2.0 to Mekanism 9.7.4.375. Chunk loaded Solar Neutron Activators crash the server on load.

Steps to reproduce:

1. Have active solar neutron activators in mekanica chunk loaded and working
2. Switch mekanica to mekanism
3. Start server

Workaround:

Destroy the activators prior to mod switch and redeploy them afterwards.

Version (make sure you are on the latest version before reporting):

Forge: 14.23.5.2836
Mekanism: 9.7.4.375
Other relevant version: Mekanica 1.2.0

If a (crash)log is relevant for this issue, link it here: (It's almost always relevant)

https://pastebin.com/rTHyL1Ep