[data-import] Upsert Custom Metadata Bug with Metadata Relationship Column

[IamKewal]

Describe the bug This issue is related to the Data Import screen when Custom metadata records are being Upserted. If the selected object is child Custom metadata type and the excel contains the column of the parent Custom Metadata relationship, then this error comes:

Unable to find a deserializer for the type Error Id: 998110671-307073 (1208136597)

Records contains the 18 Digit Id of the parent custom metadata record in this column (I have already tried to replace it with the developer name of the parent custom metadata record).

To Reproduce Steps to reproduce the behavior:

1. Go to Data Import screen
2. Select API Type: Metadata
3. Action Upsert Metadata
4. Object: Child Custom Metadata Type (with relation ship field with other metadata type)
5. Paste the Data from Excel
6. Click on Run Upsert Metadata
7. See error: Unable to find a deserializer for the type Error Id: 998110671-307073 (1208136597)

Expected behavior Record should successfully get upserted.

Screenshots

Desktop (please complete the following information):

• OS: Windows
• Browser chrome
• Version 127.0.6533.89

Additional context Add any other context about the problem here.