We have multiple m5 generation MySQL RDS instance. The problem we are facing is that while creating read replica for these instances we are repeatedly getting 'incompatible-restore' error. In the event log of read replica instance we are getting below error :
Database instance put into incompatible-restore. Your MySql memory setting is inappropriate for the usages
However, if we set the parameter group to 'default-5.7' then the read replica gets successfully created.
We have found the differences between the current parameter group and 'default-5.7' and tried to make those changes. But still the issue persists.