No worries, we are all here to learn 🙂
If this is the case, can you confirm that in the Precedence Constraint Editor, that you have the Evaluation Operation set to "Constraint", Value set to "Failure", and "Logical And. A;; constraints must evaluate to True" checked?
1. You need to double-click on the line/arrow from your maintenance task, that joins to your email task. This opens the "Precedence Constraint Editor"
2. In this new pop-up window, set the Evaluation Operation to "Constraint"
3. Set Value to "Failure"
4. In the last choice at the bottom, set the "Logical And. A;; constraints must evaluate to "True"
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