By closing one sprint or a board within a Project, other sprint or board get closed in other projects. The boards are totally independent from each other and they're not parallel.
Hi @Mahboube Maleki
It seems that you are facing the issue addressed in the following KB: https://confluence.atlassian.com/jirakb/sprints-shared-between-multiple-boards-779159068.html where the same sprint appears on two different boards. This is explained in details in the KB.
A quick way to check this would be to query this sprint in the Jira Issue Navigator Eg:
Sprint = Sprint A
then check if this pulls issues from both the boards.
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