Salesforce Fact #930 | Need to be careful while changing OWD to Public Read/Write

If we have used the share object of any custom object in apex or flow logic, we need to be careful while changing its OWD to Public Read/Write.

While changing the OWD it won't show any reference error and trying to run the logic afterwards would show the below error:

System.DmlException: Insert failed. First exception on row 0; first error: FIELD_INTEGRITY_EXCEPTION, field integrity exception: AccessLevel (trivial share level Read, for organization with default level Edit): [AccessLevel]