Ao importar do arquivo vendedores.csv, ocorre o seguinte erro e não importa nenhum dado:

Starting...
Prepare Import...
Prepare Import done
Import data file....
- Prepare Import
- Begin Import
- Row import failed with error: ("Incorrect date value: '41866' for column 'DATA_ADMISS\xc3\x83O' at row 1", 1292)
- Row import failed with error: ("Incorrect date value: '41534' for column 'DATA_ADMISS\xc3\x83O' at row 1", 1292)
- Row import failed with error: ("Incorrect date value: '42812' for column 'DATA_ADMISS\xc3\x83O' at row 1", 1292)
- Row import failed with error: ("Incorrect date value: '42603' for column 'DATA_ADMISS\xc3\x83O' at row 1", 1292)
- Import finished
Import data file finished
Finished performing tasks.