So you realise that you describe a rollback sitiuation.
Start point 5-12-2025
Proposed 1-12 -2025 
Ignored refers to the fact that you can install this with the roll-back hazard but you must not lock – risk of bricking.
In other words
Install unlocked: ROLLBACK PROTECTION ERRORS ARE IGNORED (the “error” [1] exists but is ignored)
If you lock this proposed /e/OS build: ROLLBACK PROTECTION ERRORS ARE TRIGGERED and we are told the phone may be bricked.
- Never go back.
[1] The “error” in Android terms is that the Android environment is forced back against Android rules and thus by_the_rules lacks full integrity.