What is INVALID_FIELD_FOR_INSERT_UPDATE, cannot specify Id in an insert call: [Id]: Trigger.Acc: line 11, column 1: and how to avoid it?
Answer (1)
The for loop contains your DML expression. As a result, it keeps attempting to insert the list into the loop. This bitlife online will function properly for a single transaction, but it will fail as soon as you attempt to use it for many transactions.
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