Personal model training Dreambooth will not complete successfully whith 2GB Model File

I created a dreamboot space and successfully calculated a model. A 4GB model file was created. I have now tried 4x to calculate another model. However, the training in the app page is not completed. After 30 minutes I get the message on my account that the model was created successfully. The app side is still calculating. I can already see and open the model via my account. However, only a 2GB model file was created. However, the images generated with this model are not usable. Only a matscieger porridge is created. How do I find what didn’t work? I’ve already created a new space as a test. But that didn’t do anything.