[BUG] Indexed unique will not work after Field regex.

[hgalytoby]

Describe the bug
Indexed unique will not work after Field regex.

To Reproduce

not work

class RegexTest(Document):
    val: Indexed(str, unique=True) = Field(regex=r"^[a-zA-Z0-9]+$")


await RegexTest(val='123').create()
await RegexTest(val='123').create()

work

class RegexTest(Document):
    val: Indexed(str, unique=True) = Field()


await RegexTest(val='123').create()
await RegexTest(val='123').create()

[github-actions]

This issue is stale because it has been open 30 days with no activity.