When using Simple Caching the cache IDs typically use the following format:
- panels_simple_cache:[display ID]:[pane ID]:[object ID]
When you are building the panel definition, i.e the definition is in the database, the cache ID will look like these:
If the panels definition is exported and the in-database overrides are reverted, you end up with cache IDs as follows:
Note one glaring problem: it doesn't reference what the entity is, so there's a strong chance of e.g. the panel for user ID 26 conflicting with node ID 26.