# Compatibility and troubleshooting

Prefab patches are deliberately rejected when Patch Manager cannot apply them safely. This section helps distinguish authoring, composition, discovery, and runtime problems.

* [Diagnosing prefab patch problems](/doc/diagnosing-prefab-patch-problems-qhK2Hx1YgV) provides a step-by-step routine using the metadata Inspector, effective preview, Console, and `pm_summary.log`.

For cross-mod design, also read [Dependencies, conflicts, and ordering](/doc/dependencies-conflicts-and-ordering-W2c7gryhWl).

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**Documents**

- [Diagnosing prefab patch problems](https://docs.ksp2redux.org/s/0a4a3e31-0b40-48e0-bd81-e14856f80d3d/doc/diagnosing-prefab-patch-problems-qhK2Hx1YgV)