ASP.NET Membership changing applicationName not reflecting on created user's application id

Question

I have used ASP.NET membership in my ASP.NET MVC project. When configuring membership in my webconfig I had forgotten to mention applicationName in my config.

So by default when user were created by my site an applicationName '/' was added to the aspnet_Applications table.

Later I found this post by ScottGu where he has also said to set the "applicationName" property when configuring the Membership providers.

Now I added another entry to this aspnet_Applications table say 'Abc' and also added the applicationName="Abc" in my membership config. Now I expected all the users created hence forth to have ApplicationId of "Abc".

Still the old ApplicationId (of '/') only is getting used.

Can someone guide me on this please.

Update:

My config:

<membership defaultProvider="CustomSqlMembershipProvider" userIsOnlineTimeWindow="15" hashAlgorithmType="CustomPbkdf2Hash">
  <providers>
    <clear />        
    <add name="CustomSqlMembershipProvider" type="Abc.Service.Services.SecurityService.CustomMembership.CustomSqlMembershipProvider" connectionStringName="AbcAdManagementAspNetConnection" applicationName="Abc Web Application"  enablePasswordRetrieval="false" enablePasswordReset="false" requiresQuestionAndAnswer="false" requiresUniqueEmail="true" description="Stores and retrieves membership data from SQL Server Stored Proc"  />
  </providers>
</membership>