When something happens on a project where the timeline becomes out of sync, you'll sometimes see the following issue:
The Error will state that a dependency loop was detected while processing the following tasks:
In order to fix this issue, you need to get to the last task listed in the error (the child task in this case) and remove the predecessor.
Once done, you'll refresh the page and recalculate the timeline and the other predecessors will have been removed and the timeline synced back up without an error.
Thank you for taking the time to provide feedback. We appreciate and value your contribution to our site. Feedback provided here is regularly reviewed by our Product Documentation team. Please ensure your comments are specific to improving this help article. Any questions or requests outside this help article content should be directed to our Community User Forum or by submitting a ticket to customer support.