If you received a test conflict error, this means that you are trying to schedule or run more than one test at a time for the same product. Running or scheduling more than one test for the same product can lead to multiple variable changes during the duration of a test, which would make it impossible to know which variable change helped or hurt the overall test performance. Instead, syncX: A/B Testingrequires that you only test one variable at a time for each product, leaving all other variables the same.