Index: lams_common/db/model/lams_11.clay
===================================================================
diff -u -r3ed1429e34ca4653f94fe6ba93811d9e310c4cb2 -re622b5fb24c1edb8f66aae51bf09ca139ea2692f
--- lams_common/db/model/lams_11.clay	(.../lams_11.clay)	(revision 3ed1429e34ca4653f94fe6ba93811d9e310c4cb2)
+++ lams_common/db/model/lams_11.clay	(.../lams_11.clay)	(revision e622b5fb24c1edb8f66aae51bf09ca139ea2692f)
@@ -1109,11 +1109,11 @@
 <variant type-name-pattern="VARCHAR(%n) BINARY" precision-variable="%n" precision-min="1" precision-max="255"/>
 </data-type>
 </column>
-<column name="to_activity_id" alias="" remarks="" mandatory="true" column-size="20" decimal-digits="0" default-value="0" auto-increment="false">
+<column name="to_activity_id" alias="" remarks="" mandatory="false" column-size="20" decimal-digits="0" default-value="" auto-increment="false">
 <column-description/>
 <data-type name="BIGINT" jdbc-type="-5" selected-variant-pattern="BIGINT(%n)">
-<variant type-name-pattern="BIGINT(%n)" precision-variable="%n" precision-min="0" precision-max="19"/>
 <variant type-name-pattern="BIGINT"/>
+<variant type-name-pattern="BIGINT(%n)" precision-variable="%n" precision-min="0" precision-max="19"/>
 <variant type-name-pattern="BIGINT(%n) UNSIGNED" precision-variable="%n" precision-min="0" precision-max="19"/>
 <variant type-name-pattern="BIGINT(%n) UNSIGNED ZEROFILL" precision-variable="%n" precision-min="0" precision-max="19"/>
 <variant type-name-pattern="BIGINT(%n) ZEROFILL" precision-variable="%n" precision-min="0" precision-max="19"/>
@@ -1122,11 +1122,11 @@
 <variant type-name-pattern="BIGINT ZEROFILL"/>
 </data-type>
 </column>
-<column name="from_activity_id" alias="" remarks="" mandatory="true" column-size="20" decimal-digits="0" default-value="0" auto-increment="false">
+<column name="from_activity_id" alias="" remarks="" mandatory="false" column-size="20" decimal-digits="0" default-value="" auto-increment="false">
 <column-description/>
 <data-type name="BIGINT" jdbc-type="-5" selected-variant-pattern="BIGINT(%n)">
-<variant type-name-pattern="BIGINT(%n)" precision-variable="%n" precision-min="0" precision-max="19"/>
 <variant type-name-pattern="BIGINT"/>
+<variant type-name-pattern="BIGINT(%n)" precision-variable="%n" precision-min="0" precision-max="19"/>
 <variant type-name-pattern="BIGINT(%n) UNSIGNED" precision-variable="%n" precision-min="0" precision-max="19"/>
 <variant type-name-pattern="BIGINT(%n) UNSIGNED ZEROFILL" precision-variable="%n" precision-min="0" precision-max="19"/>
 <variant type-name-pattern="BIGINT(%n) ZEROFILL" precision-variable="%n" precision-min="0" precision-max="19"/>