Scenario:
1. mkdir test
2. cd test
3. darcs init
4. touch file
5. darcs add file
6. darcs record...
7. darcs tag v1.10
8. more changes and records
9. darcs tag v1.10
10. darcs list tags

Problem:
Here as the user I wanted to tag the initial version as v1.00 but tagged it as v1.10 by mistake.
Now after a month of development I tagged the current version as v1.10 introducing a duplicate by 
accident.
I realize my error and now want to 'fix' the previous tagging to reflect the actual distributed version 
of the software.
As a new user I don't know how to rename the older tag.

Workarounds:
1. darcs changes --xml and find the identifier of the initial wrong tag.
2. darcs get to the specific hash in a new directory
3. darcs obliterate the tag
4. darcs tag with proper name
5. darcs pull the remaining patches

The workaround is not obvious and 'feels' like working on the plumbing level.

Expected:
As a user I expect an easier interface for fixing such mistakes. Possible options include a darcs 
rename tag command that would perform the required actions to fix the issue.

I also think that darcs tag should warn about duplicates and asked to use 
--force before creating one.

Isn't this addressed by darcs amend --edit?