Locked out of new GS290

I bought two GS290 phones a couple of years ago. I have been using one which i dropped and the screen cracked! I powered up the other phone but suddenly it wants me to enter my “pattern” to unlock it. Thing is, I never installed a pattern on that phone. Now after many attempts to open it i received a message that a few more attempts and my phone will be “wiped”. HELP…PLEASE…

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