Error11 reports
Fix SolverProblemError
in Poetry
✅ Solution
SolverProblemError in Poetry usually arises from conflicting dependencies or constraints within your pyproject.toml file, often due to incompatible version requirements or missing markers for conditional dependencies. Resolve it by carefully reviewing your dependencies, relaxing version constraints (using broader ranges like "~" or "^"), and adding appropriate markers to ensure compatibility based on Python version or environment.
Related Issues
Real GitHub issues where developers encountered this error:
Poetry is broken on python3.9 due to dulwich dropping python 3.9 supportNov 10, 2025
Poetry constraint validation does not seem to take account of markersNov 6, 2025
Version solving fails for dependency in optional-dependencies and group.Jun 24, 2025
Poetry does not install torch as defined in extra-groupJun 23, 2025
Installation of torch with dependency groups leads to AssertionError/OverrideNeededErrorJun 19, 2025
Timeline
First reported:Feb 14, 2025
Last reported:Nov 10, 2025