How do I fix "Data Extension could not be updated. The SendableCustomObjectField is invalid" error when editting a Data Extension?

If you are editing the structure of your Target Data Extension in DESelect Segment, and when you click save you receive this error message: "Data Extension could not be updated. The SendableCustomObjectField is invalid", this article might help you!

When you edit a Data Extension in SFMC (remove fields, add fields, update the Send Relationship, if it's a Sendable DE) and click update, Salesforce will try to process all the changes in no particular order, which might lead to incongruences in the Data Extension structure, and throw an error.

To prevent it, you will need to do each update action you are proceeding with one by one:

• First, remove the fields that you no longer want. Click update, and wait for Salesforce to process it.
• Then, add or rename the fields that you need in your DE. Click update, and wait for a confirmation
• Finally, update the Send Relationship of your DE, and once again, click Update.

This will ensure the update actions are processed in the right order to avoid issues or to identify which of the previous actions triggers the error, so it's easier to debug.

If after doing this you still encounter errors, you might want to review this article about other considerations you need to take into account when editing an existing Data Extension