Sitecore Failed to update profile pattern

My Sitecore CD servers logged the following errors 2-3 times per minute:

7760 11:10:46 ERROR Failed to update profile pattern
Exception: System.ArgumentNullException
Message: Value cannot be null.
Parameter name: item
Source: Sitecore.Kernel
at Sitecore.Diagnostics.Assert.ArgumentNotNull(Object argument, String argumentName)
at Sitecore.Analytics.Data.Items.ItemRecords`1.<GetDescendants>d__8.MoveNext()
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at Sitecore.Analytics.Data.Items.ProfileItem.get_MappedPatterns()
at Sitecore.Analytics.Data.Items.ProfileItem.MatchPattern(IProfileData profile, IPatternDistance distance)
at Sitecore.Analytics.Tracking.Profile.UpdatePattern()

The error occurs because the editors who set up the profile and pattern cards on the solution accidentally renamed the Pattern Cards folder:

Profile and Pattern Cards

Profile and Pattern Cards

Do not rename the folder names. Sitecore uses the names to find the cards. Instead, change the Display Name if the name of the folder does not suit you.

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About briancaos

Developer at Pentia A/S since 2003. Have developed Web Applications using Sitecore Since Sitecore 4.1.
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