[BUG] "Enforcement" of the playground not works?

[fy0]

Describe the bug
Conflict assertions is both allowed in enforcement.

To Reproduce
Steps to reproduce the behavior:

Empty case with the following code:

- name: test
  checks:
    - entity: project:1
      subject: user:1
      assertions:
        read: true
        read: false

Example Application
https://play.permify.co/?s=gc2RPvd3v1w0Pavdqysm3

Expected behavior
One allowed, one rejected.

Additional context

Environment (please complete the following information, because it helps us investigate better):

• OS: [e.g. macOS]
• Version [e.g. 22]