To remove inactive users or trouble users from your ASP.net Memebership tables use the following SQL script.
DECLARE @UserName nvarchar
SET @UserName = ‘USER NAME HERE’
DECLARE @UserId uniqueidentifier
SET @UserId = (SELECT UserId FROM aspnet_Users WHERE UserName = ‘Admin2017’)
DELETE FROM aspnet_Profile WHERE UserID = @UserId
DELETE FROM aspnet_UsersInRoles WHERE UserID = @UserId
DELETE FROM aspnet_PersonalizationPerUser WHERE UserID = @UserId
DELETE FROM aspnet_Membership WHERE UserID = @UserId
DELETE FROM aspnet_users WHERE UserID = @UserId
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