Hi @scourgio 

1. Type cmdb_ci.LIST in the application navigator

2. Check whether:

• records exist in the CMDB
• the records are active

3. Create a test CI manually, for example under:

cmdb_ci_service.LIST

Add a record such as:

• Name: Test Server
• Status: Installed
• Operational status: Operational

After saving the CI, test the Incident form again. The Configuration Item field should start returning results.

In PDIs, sample/demo CMDB data can sometimes be removed after resets or upgrades, so reloading demo data or creating test CIs usually resolves the issue.

(or)

If you are talking about the Existing incidents only doesn't have the values of ci, but the new incident forms has the value.

Unable to search CIs in existing incidents - Support and Troubleshooting - Now Support Portal

Refer this article.

Hope it helps