When loading the Edit Web Service form and adding a long label name in, the instance fails to create the corresponding column.
Steps to Reproduce
1. Navigate to System Web Services > Inbound > Computer in the filter navigator:
2. Double click the label field to add a label with a 49 characters the value "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvw".
3. Click the Update UI Action.
The new column does not get added, the logs show the alter reverted and no net change exists.
This problem is under review and targeted to be fixed in a future release. To receive notifications when more information becomes available, subscribe to this Known Error article by clicking the Subscribe button at the top right of this form.
As a workaround, navigate to the table directly to add the column, the field is aliased to a shorter column name and created properly. Alternatively perform the alter accessing the Dictionary.
Related Problem: PRB1389086