To allow the import to continue without stopping at the error, modify the Identity Governance property "import.csv.shouldFailOnDuplicateUser" from true to false.
1. Go to Administration / Settings / Property Settings
2. Edit Property "import.csv.shouldFailOnDuplicateUser
" from true to false
<Please see attached file for image>Caution
While it is possible to allow the import process continue, It might not be a good idea as you will end up have 2 duplicated IDs in the system without notification. Please consider the consequences of this action before continuing in a production environment.