Please help us help you and fill where relevant: LimeSurvey version: 7.0.10 Own server or LimeSurvey Cloud: Own Server Survey theme/template:
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When I am initiating Database Migration from 651 to 710, it is failing. My Database has around 5000+ surveys.
What is your question? LimeSurvey supports three different databases. You can open a bug ticket but don't forget to mention what database you use. If you want to ask other users about their migration experience you better post more information about the database software and exact version / build here.
I recommend to check the minimum requirements for LS 7.0 first.