unable to trigger a product rule for Attribute group

Summary:

unable to trigger a product rule for Attribute group

Content (required):

Hello everyone,

I'm trying to write a product rule that whenever someone tries to change "Purchasable" item attribute, system should create a change order when we try to save the item.

I created a new Rule Set using the following details and added it to MASTER_RULE_SET and Draft checkbox is unchecked.

Type: Validations

Composite: No

Association Type: Attribute group

Association Name: Purchasing

Draft: No

Business Entities: Item

Valid Component Rules: No

Severity: Needs Approval

IF Expression: changed([Item].[Purchasing].[Purchasable])

*Validation Condition:true

Version (include the version you are using, if applicable): 21C