diff --git a/schema/lib/elements/he_ipv6.xsd b/schema/lib/elements/he_ipv6.xsd
index 8ab3cf4..db6dc60 100644
--- a/schema/lib/elements/he_ipv6.xsd
+++ b/schema/lib/elements/he_ipv6.xsd
@@ -30,13 +30,17 @@
                   </xs:extension>
                 </xs:simpleContent>
               </xs:complexType>
-              <xs:unique name="uniq_alloc_prefix">
-                <xs:selector xpath="alloc"/>
-                <xs:field xpath="@prefix"/>
-              </xs:unique>
             </xs:element>
           </xs:sequence>
         </xs:complexType>
+        <xs:unique name="uniq_alloc_prefix">
+          <xs:selector xpath="alloc"/>
+          <xs:field xpath="@prefix"/>
+        </xs:unique>
+        <xs:unique name="uniq_alloc_addr">
+          <xs:selector xpath="alloc"/>
+          <xs:field xpath="."/>
+        </xs:unique>
       </xs:element>
       <xs:element name="client" minOccurs="1" maxOccurs="1">
         <xs:complexType>
diff --git a/schema/projects/he_ipv6.xsd b/schema/projects/he_ipv6.xsd
index 1615ee5..2dc2e25 100644
--- a/schema/projects/he_ipv6.xsd
+++ b/schema/projects/he_ipv6.xsd
@@ -23,10 +23,6 @@
           <xs:complexType>
             <xs:sequence>
               <xs:element name="tunnel" minOccurs="1" maxOccurs="unbounded" type="e_he_ipv6_tunnel">
-                <xs:unique name="uniq_alloc_addr">
-                  <xs:selector xpath="heIPv6:tunnel/alloc"/>
-                  <xs:field xpath="."/>
-                </xs:unique>
               </xs:element>
             </xs:sequence>
           </xs:complexType>