According to the 2020 report on Property constraints (T244043):

There are 15 constraints with more than 100 exceptions each. Two of these constraints have so many exceptions (2,095 and 683) that WikibaseQualityConstraints cannot afford to read them, which results in an error message ("The parameters of this constraint could not be imported because they were too long"). […]
It is suggested to propose a bot task that consists of automatically removing all constraints with an unreasonable number of exceptions (e.g., more than 70, 80, 100), […]. The sole application of a lower hard limit is discouraged, as it would not allow the automatic detection and removal of wrongly defined constraints, causing their accumulation with the maximum number of exceptions.