diff --git a/v3_30_0/CDT-mgmtCmd-v3_30_0.xsd b/v3_30_0/CDT-mgmtCmd-v3_30_0.xsd
index 853841a466f5ec72f450aa60411e045a4fb2252c..e1b5dd9a30438ecfd94728f93ad7d05acfe86abc 100644
--- a/v3_30_0/CDT-mgmtCmd-v3_30_0.xsd
+++ b/v3_30_0/CDT-mgmtCmd-v3_30_0.xsd
@@ -49,7 +49,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 						<xs:element name="execNumber" type="xs:nonNegativeInteger" minOccurs="0" />
 
 						<!-- Child Resources -->
-						<xs:choice minOccurs="1" maxOccurs="1">
+						<xs:choice minOccurs="0" maxOccurs="1">
 							<xs:element name="childResource" type="m2m:childResourceRef" minOccurs="1" maxOccurs="unbounded" />
 							<xs:choice minOccurs="1" maxOccurs="unbounded">
 								<xs:element ref="m2m:execInstance" />