Crash - Custom Object Model Delete on Set Preview [BUG]

**Describe the bug**
A clear and concise description of what the bug is.

Crash - Custom Object Model Delete on Set Preview

**To Reproduce**
Steps to reproduce the behavior:

(Using Linux)

Add Custom Object Node
Add Bevel Modifier Node
Adjust settings on Bevel Modifier

Click "Set Preview" (forget if it's on Custom Object or Bevel Modifier)

Poof! Model is deleted.

**Expected behavior**
A clear and concise description of what you expected to happen.

A Preview

**Screenshots**
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**Desktop (please complete the following information):**

- OS: [e.g. Linux]
- Blender Version [e.g. 2.81]
- Sorcar Version [e.g. 3.1.3]

**Additional context**
Add any other context about the problem or your proposed solution here.

Messing with the modifier buttons, even when it does behave as expected, causes the
model to be deleted.