Data Load issue in _CEL_P2P_ACTIVITIES for file uploads

Im trying to load some files, the model is correctly loaded with correct foreign key, have loaded both files with the same datatype INTEGER for _CASE_KEY column. While trying to load data, im facing the issue mentioned below: Data model load failed during load to engine: Could not load data model. Load failed. Error Message: Error while joining table PO_DISTRIBUTIONS_ALL_xlsx_Export_Data with table _CEL_P2P_ACTIVITIES_xlsx_Export_Data. Data type of column _CASE_KEY doesnt match data type of column _CASE_KEY. Celonis Support ID: 8e12a1b3-589b-4720-be56-8b90a0fd6e7d Please help.