I created Requirement folder structure, imported that to Test plan.
I created my test cases in excel, imported them to Test plan.

i had some updations in test cases so i edited my testcases that were in excel document and then imported again to test plan.

When i tried to pull test cases via requirements in Test lab i could see duplicate copies. These duplicates were not available in Requirements but were available in test lab (Requirements Tree).

How can i avoid this.