A regurgitation can be due to different things and all you can do is to try to eliminate the possible cause

In the meantime no feeding for 2 weeks

Regurgitation can be due to

Improperly thawed or bad feeder

Improper temps not allowing digestion

Stress

Internal parasites

Health issues.

In two weeks if you feed your BP and it regurges again you will need to take it to a vet, in most cases it does not re-occur and the main cause can be found by elimination.