Microsoft cloud engineer - SharePoint, Office 365, Azure, DotNet, Angular, JavaScript.
Microsoft cloud engineer - SharePoint, Office 365, Azure, DotNet, Angular, JavaScript.

Event Error 5553 – failure trying to synch site”??” for ContentDB “??” WebApp “??”. Exception message was Cannot insert duplicate key row in object ‘dbo.UserMemberships’ with unique index

I ran into this problem this week after doing several site collection moves.     The resolution is simple, effective, and only take a few minutes.

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