Gl Import Process: error message invalid attempt to populate a disabled field: projected and task

Trying to import a GL summary report to GL transaction screen (0101000), the message indicates

"invalid attempt to populate a disabled field: projected and task with value : L18082".  I have checked all the set up in SL are active, such as: project ID, Task ID, Account number, Acct category...etc.

Any idea what causes the issue?

thanks

'System Message 8011: ========Begin Processing of a Level1 Data Line========

'Level1,100,2174,L18082,10210P7OT HRS       MTIN       ,10000000,,3/8/2018,,,,0,0,2.84,Payroll Transactions

'System Message 8005: New Record Requested

'System Message 8036: Invalid attempt to populate a disabled field: cprojectid with value: L18082

'System Message 8036: Invalid attempt to populate a disabled field: ctaskid with value: 10210P7OT HRS       MTIN      

'System Message 9202: Control name not found in current application: xuser6

'System Message 9202: Control name not found in current application: xuser7

'System Message 8012: ========Successful Processing of a Level1 Data Line========

'System Message 8011: ========Begin Processing of a Level1 Data Line========

'Level1,100,2174,L18082,10210P7REG HRS     MTIN       ,10000000,,3/8/2018,,,,0,0,0.25,Payroll Transactions

'System Message 8005: New Record Requested

'System Message 8036: Invalid attempt to populate a disabled field: cprojectid with value: L18082

'System Message 8036: Invalid attempt to populate a disabled field: ctaskid with value: 10210P7REG HRS     MTIN      

'System Message 9202: Control name not found in current application: xuser6

'System Message 9202: Control name not found in current application: xuser7