Is there an existing issue for this?

• I have searched the existing issues for a bug report that matches the one I want to file, without success.

Did you read the documentation and troubleshoot guide?

• I have read the documentation and troubleshoot guide

Environment

- **OS**: any
- **Sage Version**: 10.0.beta0

Steps To Reproduce

sage: hash(SkewTableau([[1]]))

Expected Behavior

Should be a hash.

Actual Behavior

Fails

Additional Information

This is because it overrides equality, see

https://groups.google.com/u/2/g/sage-devel/c/DrxRHl3dQOU