Symptoms

Error:After updating to K2 Blackpearl 4.6.9:Guid should contain 32 digits with 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx).
 

Diagnoses

During our meeting with the customer we found that all forms except that one was throwing this error when we open it. We also discovered that we are able to open referenced views individual without getting the error. This could only mean that there is a mapping problem between the form and views.
 

Resolution

We worked around the issue by removing individual views from the form and adding them back again.