Bug: Error HH603: Hardhat flatten doesn't support cyclic dependencies

[log2cn]

Describe the bug
I encountered an error when trying to flatten my contracts using Hardhat. The error states that cyclic dependencies are not supported.

To Reproduce
Steps to reproduce the behavior:

• Run the command npx hardhat flatten in my project directory.
• Observe the error message.

Error HH603: Hardhat flatten doesn't support cyclic dependencies.

Expected behavior
I expected the flattening process to complete successfully without encountering an error regarding cyclic dependencies.

Screenshots
N/A

Environment

• Operating System: [Windows]