Steps to reset net change data file

Summary

After prod to dev data clone. Candidate Net change import is going into error with error 'Threshold for deleted entities has been reached. Allowed: 10.0% Actual: 69.48882% '

Content

After prod to dev data clone. Candidate Net change import is going into error with  error 'Threshold for deleted entities has been reached. Allowed: 10.0% Actual: 69.48882% '

Instead of increasing delete  threshold. I want to reset the net change file with new data file. 

Could you please advice how can I reset the net change data file.

Thanks.  

Version

TCC 17.4