Cause
A part in the device list was used more often than allowed.
Solution
Possibility 1
Delete the part in the schematic. Refer to the value entered in the parts column Number allowed.
Possibility 2
Increase the number of allowed pieces for the part in the device list. To do this, highlight the part in the device list. Select Popup menu > Properties. Increase the value under Number allowed in the Properties <...> dialog.
Then start a new check run.