This is a Dentrix database related issue when Dentrix has encountered a record in the database with some "invalid data" fields.

Dentrix recommends dental office to contact Dentrix support to have the data cleaned by data cleanup technicians. The process will take about 30-60 minutes.

Dentrix also recommends upgrading to the latest version of Dentrix to at least the G5.2+ versions ASAP.

More here