Create Cost Accounting Process ends in warning

Summary: While running create cost accounting distribution, the process ends in warning with warning message as below:

The input source values don't map to any output value defined in mapping set Inventory Valuation. Details: You must either define a default output for mapping set or specify mappings for all possible input values

Content (please ensure you mask any confidential information):

The 'Inventory Valuation' account is missing for all the transactions but all the mapping set is defined correctly. We have 133 such errors.

This is only for the Event Class - Cost Adjustment and Event Type - Standard Cost Adjustment

Version (include the version you are using, if applicable): Oracle Fusion Cloud Applications 23D (11.13.23.10.0)