Error Title conflicting with existing Product title catalog

Hello sellers i am a new seller to Amazon i listed my first product with 5 variations, i thought fo each variation  only need one GTIN, after occuring some errors as per the instructions from support team i deleted that listibg an relisted with different GTIN, Here i started to facing big problem, when i create variation the main product title conflict with a product already in the Amazon Catalog, i dont know how to solve this errors please Help me out.