diff --git a/metacat-metadata-mysql/src/main/java/com/netflix/metacat/metadata/mysql/MySqlLookupService.java b/metacat-metadata-mysql/src/main/java/com/netflix/metacat/metadata/mysql/MySqlLookupService.java
index 3b0217f7c..0f32974aa 100644
--- a/metacat-metadata-mysql/src/main/java/com/netflix/metacat/metadata/mysql/MySqlLookupService.java
+++ b/metacat-metadata-mysql/src/main/java/com/netflix/metacat/metadata/mysql/MySqlLookupService.java
@@ -50,8 +50,7 @@ public class MySqlLookupService implements LookupService {
     private static final String SQL_INSERT_LOOKUP_VALUES =
         "insert into lookup_values( lookup_id, values_string) values (?,?)";
     private static final String SQL_INSERT_LOOKUP_VALUE_IF_NOT_EXIST =
-        "INSERT INTO lookup_values(lookup_id, values_string) VALUES (?,?) "
-            + "ON DUPLICATE KEY UPDATE lookup_id=lookup_id, values_string=values_string";
+        "INSERT IGNORE INTO lookup_values (lookup_id, values_string) VALUES (?, ?)";
 
     private static final String SQL_GET_LOOKUP_VALUES =
         "select values_string value from lookup_values where lookup_id=?";
diff --git a/metacat-metadata-mysql/src/test/groovy/com/netflix/metacat/metadata/mysql/MySqlLookupServiceSpec.groovy b/metacat-metadata-mysql/src/test/groovy/com/netflix/metacat/metadata/mysql/MySqlLookupServiceSpec.groovy
index 644948913..c82f537fb 100644
--- a/metacat-metadata-mysql/src/test/groovy/com/netflix/metacat/metadata/mysql/MySqlLookupServiceSpec.groovy
+++ b/metacat-metadata-mysql/src/test/groovy/com/netflix/metacat/metadata/mysql/MySqlLookupServiceSpec.groovy
@@ -50,7 +50,7 @@ class MySqlLookupServiceSpec extends Specification {
         def lookupWithValues = new Lookup(
             id: 1L,
             name: 'Test1',
-            values: new HashSet<String>(['tag1', 'tag2']),
+            values: new HashSet<String>(['tag1', 'tag1', 'tag2']),
             dateCreated: new Date(),
             lastUpdated: new Date()
         )
@@ -68,12 +68,13 @@ class MySqlLookupServiceSpec extends Specification {
         then:
         lookUpResult.values == expectedValues
         where:
-        tagsToAdd                       | includeValues | expectedValues
-        ['tag1', 'tag2'] as Set<String> |true           | ['tag1', 'tag2'] as Set<String>
-        ['tag1', 'tag2'] as Set<String> |false          | [] as Set<String>
-        ['tag1', 'tag3'] as Set<String> |true           | ['tag1', 'tag2', 'tag3'] as Set<String>
-        ['tag1', 'tag3'] as Set<String> |false          | [] as Set<String>
-        ['tag3', 'tag4'] as Set<String> |true           | ['tag1', 'tag2', 'tag3', 'tag4'] as Set<String>
-        ['tag3', 'tag4'] as Set<String> |false          | [] as Set<String>
+        tagsToAdd                               | includeValues | expectedValues
+        ['tag1', 'tag2'] as Set<String>         |true           | ['tag1', 'tag2'] as Set<String>
+        ['tag1', 'tag2'] as Set<String>         |false          | [] as Set<String>
+        ['tag1', 'tag3'] as Set<String>         |true           | ['tag1', 'tag2', 'tag3'] as Set<String>
+        ['tag1', 'tag3'] as Set<String>         |false          | [] as Set<String>
+        ['tag3', 'tag4'] as Set<String>         |true           | ['tag1', 'tag2', 'tag3', 'tag4'] as Set<String>
+        ['tag3', 'tag4'] as Set<String>         |false          | [] as Set<String>
+        ['tag3', 'tag3', 'tag4'] as Set<String> |true           | ['tag1', 'tag2', 'tag3', 'tag4'] as Set<String>
     }
 }