What is this error after using a script for splitting head and body and using deformers ?

2023-02-15 16:50:56.722 [WARNING] :: Index out of range in DzWeightMapValues::getWeight()
2023-02-15 16:50:56.722 [WARNING] :: Index out of range in DzWeightMapValues::getWeight()

Now my morphs don't work anymore.