3209882 - Is it Possible to Change the Field Type of a KUT Field

You have created a KUT (Extension) Field with Field Type. Later, you have a requirement to change the Field Type.

For Example: Field Type was created as Text (120 char) and you wants to change it to Extended text

SAP Business ByDesign

A field type can not be changed after a KUT field has been created.

If its the wrong one, you have to create a new field

If it is a PDI field, You can refer to the KBA - 2659812 - How to Change Property of an Extention Field in the UI Designer

KBA , AP-RC-UIF-RT-B , ByD HTML5 Client (not for Cloud for Customer) , Problem