how to remove duplicates ONLY within the same category
Hi, grateful if you could help me on this regarding removing duplicates ONLY
within the same category but not across categories.
e.g.
item category
hair hair restoration
hair loss hair restoration
hair hair restoration
hair hair care
shampoo hair care
I want to return -
item category
hair hair restoration
hair loss hair restoration
hair hair care
shampoo hair care
Any help would be much appreciated!
Thanks!
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