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# Troubleshooting scopes

## Cannot add scope

##### Symptom

Clicking Create or Create+ does not generate a scope.

### Invalid characters

The scope name was entered with invalid characters.

##### Cause

##### Action

Re-enter the scope name using only alphanumeric characters, the plus sign (`+`), and space characters for the scope name.

### Non-unique scope name

##### Cause

The name given for the scope is already in use.

##### Action

Supply a unique name for the scope.

## Cannot edit or delete scope

##### Symptom

REST API call failed with Error 412, “Precondition Failed”.

##### Cause

The eTag passed in the “If-Match” request header does not match the current eTag of the scope being edited or deleted.

##### Action

Try the operation again with either a current eTag or the eTag set to “*”.

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