diff --git a/src/Umbraco.Core/Models/Rdbms/PropertyDataDto.cs b/src/Umbraco.Core/Models/Rdbms/PropertyDataDto.cs
index c4cd28f6e0..e9c1685bb3 100644
--- a/src/Umbraco.Core/Models/Rdbms/PropertyDataDto.cs
+++ b/src/Umbraco.Core/Models/Rdbms/PropertyDataDto.cs
@@ -11,7 +11,6 @@ namespace Umbraco.Core.Models.Rdbms
     {
         [Column("id")]
         [PrimaryKeyColumn]
-        [Index(IndexTypes.NonClustered, Name = "IX_cmsPropertyData")]
         public int Id { get; set; }
 
         [Column("contentNodeId")]
diff --git a/src/Umbraco.Core/Persistence/Migrations/Upgrades/TargetVersionSevenSixZero/RemovePropertyDataIdIndex.cs b/src/Umbraco.Core/Persistence/Migrations/Upgrades/TargetVersionSevenSixZero/RemovePropertyDataIdIndex.cs
new file mode 100644
index 0000000000..b50c8e5f94
--- /dev/null
+++ b/src/Umbraco.Core/Persistence/Migrations/Upgrades/TargetVersionSevenSixZero/RemovePropertyDataIdIndex.cs
@@ -0,0 +1,38 @@
+using System.Linq;
+using Umbraco.Core.Configuration;
+using Umbraco.Core.Logging;
+using Umbraco.Core.Persistence.SqlSyntax;
+
+namespace Umbraco.Core.Persistence.Migrations.Upgrades.TargetVersionSevenSixZero
+{
+    /// <summary>
+    /// See: http://issues.umbraco.org/issue/U4-9188
+    /// </summary>
+    [Migration("7.6.0", 0, GlobalSettings.UmbracoMigrationName)]
+    public class UpdateUniqueIndexOnCmsPropertyData : MigrationBase
+    {
+        public UpdateUniqueIndexOnCmsPropertyData(ISqlSyntaxProvider sqlSyntax, ILogger logger)
+            : base(sqlSyntax, logger)
+        {
+        }
+
+        public override void Up()
+        {            
+            //tuple = tablename, indexname, columnname, unique
+            var indexes = SqlSyntax.GetDefinedIndexes(Context.Database).ToArray();
+            var found = indexes.FirstOrDefault(
+                x => x.Item1.InvariantEquals("cmsPropertyData")
+                     && x.Item2.InvariantEquals("IX_cmsPropertyData"));
+
+            if (found != null)
+            {
+                //drop the index
+                Delete.Index("IX_cmsPropertyData").OnTable("cmsPropertyData");             
+            }
+        }
+
+        public override void Down()
+        {
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Umbraco.Core/Umbraco.Core.csproj b/src/Umbraco.Core/Umbraco.Core.csproj
index d76cad8a1c..9dff5aa050 100644
--- a/src/Umbraco.Core/Umbraco.Core.csproj
+++ b/src/Umbraco.Core/Umbraco.Core.csproj
@@ -440,6 +440,7 @@
     <Compile Include="Persistence\Migrations\Upgrades\TargetVersionSevenFourZero\AddUniqueIdPropertyTypeGroupColumn.cs" />
     <Compile Include="Persistence\Migrations\Upgrades\TargetVersionSevenFourZero\RemoveParentIdPropertyTypeGroupColumn.cs" />
     <Compile Include="Persistence\Mappers\TaskTypeMapper.cs" />
+    <Compile Include="Persistence\Migrations\Upgrades\TargetVersionSevenSixZero\RemovePropertyDataIdIndex.cs" />
     <Compile Include="Persistence\Migrations\Upgrades\TargetVersionSevenThreeTwo\EnsureMigrationsTableIdentityIsCorrect.cs" />
     <Compile Include="Persistence\Migrations\Upgrades\TargetVersionSevenFourZero\EnsureContentTypeUniqueIdsAreConsistent.cs" />
     <Compile Include="Persistence\Migrations\Upgrades\TargetVersionSevenThreeZero\AddExternalLoginsTable.cs" />