I have created a custom SPField and is working well. But if I retract/deploy or if a upgrade the solution, I've got this error when accessing the item:
SPField Field type is not installed properly. Go to the list settings page to delete this field.
I cannot create a new Column base on this SPField as it not available (this is the issue)
I then have to:
- go to the List Settings
- remove any occurence of my custom SPField
- Retract and redeploy as my custom SPField is not available when creating a new field
- Create the new column (My custom SPField is now available)
I've check the XML definition file and no errors. Anyone know what can cause this and how to fix it?