Unit weight Item specification mendatory while making item

Summary:

Unit weight Item specification mendatory while making item

Content (please ensure you mask any confidential information):

Hello,

We want to mandate the unit weight item specs in physical attributes while creating item. This specs should not be blank if blank then error message should shown while submitting an item for approval.

How can we achieve this

Version (include the version you are using, if applicable):

25C

Code Snippet (add any code snippets that support your topic, if applicable):