Using 'create project invoice proposals' menu item under Project management and accounting > Periodic > Project invoices. When running this in batch the batchhistory table is growing to fast. This is caused by the parameters field on the batch and batchhistory table. The tasks for the class 'ProjInvoiceProposalCreateLinesTask' is adding a record in the batch table with a huge parameters field. These parameters cannot be viewed in the user interface. Cleaning this parameters field for these specific tasks clean up the tables. This parameter field should cleared after running the task.