Could you try My Solution given in the following post as mentioned,
- Go to “Edit” option of the Agent
- Then, Go to “Package Requirements” → “Overwrite”
- Click on the Index that you really want the Agent to map to.
- The status MUST CHANGE to Available. Then click “Update”
If it Solves your issue, Do mark it as a solution.
If it does not, Do let me know, I’ll try providing a solution.
Happy Automation 