Mismatch Between Parent Rate Date Sets and Contract End Date
If you receive the error message, "There is a mismatch between Parent Rate date sets and contract end date. Please verify." (pictured below), this is due to gaps in the rate sets of the Parent Rate.
In the example below, one set ends May 5, 2020, and the next one starts on May 9, 2020. You'll have to correct the date range so there isn't a gap between date sets, and then you will be able to create the contract.