Transition is not visible only at one issue. Why?

Question

I've got a custom workflow for my issue type in the project.

It has two statuses: "One" and "Two" and there's a transition from "One" to "Two". The transition doesn't have any conditions and validators, only post-functions.

There're some issues on status "One". All of them but 1 have transition "move to two" visible. Only one issue doesn't have any transitions visible.

Why it can be so?

P.S. Using JIRA 6.

Jobin Kuruvilla [Adaptavist] · Accepted Answer

If you do not have any workflow conditions, run the integrity checker and see if the workflow integrity is compramised or not.

See https://confluence.atlassian.com/display/JIRA/Using+the+Database+Integrity+Checker