diff --git a/.liquibase/Data_alias/basic/2019.2/alter_activityLink_Derby.xml b/.liquibase/Data_alias/basic/2019.2/alter_activityLink_Derby.xml
new file mode 100644
index 0000000000000000000000000000000000000000..42dad5d1fe1233018439f983730dda81cbaf8f26
--- /dev/null
+++ b/.liquibase/Data_alias/basic/2019.2/alter_activityLink_Derby.xml
@@ -0,0 +1,11 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.6.xsd">
+    <changeSet dbms="derby" author="j.hoermann" id="4e0bce38-7470-4289-a656-2f2e34cefd9c">
+        <sql>
+            ALTER TABLE ACTIVITYLINK ADD COLUMN ACTIVITY_ID_NEW CHAR(36);
+            UPDATE ACTIVITYLINK SET ACTIVITY_ID_NEW=ACTIVITY_ID;
+            ALTER TABLE ACTIVITYLINK DROP COLUMN ACTIVITY_ID;
+            RENAME COLUMN ACTIVITYLINK.ACTIVITY_ID_NEW TO ACTIVITY_ID;
+        </sql>
+    </changeSet>
+</databaseChangeLog>
\ No newline at end of file
diff --git a/.liquibase/Data_alias/basic/2019.2/alter_activityLink_notDerby.xml b/.liquibase/Data_alias/basic/2019.2/alter_activityLink_notDerby.xml
new file mode 100644
index 0000000000000000000000000000000000000000..1f3a0b842f009417b8ed199eb918f583bf670807
--- /dev/null
+++ b/.liquibase/Data_alias/basic/2019.2/alter_activityLink_notDerby.xml
@@ -0,0 +1,6 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.6.xsd">
+    <changeSet dbms="!derby" author="j.hoermann" id="634590d7-8bcc-40f9-9615-9de7cd91e586">
+        <modifyDataType tableName="ACTIVITYLINK" columnName="ACTIVITY_ID" newDataType="CHAR(36)"/>
+    </changeSet>
+</databaseChangeLog>
\ No newline at end of file
diff --git a/.liquibase/Data_alias/basic/2019.2/changelog.xml b/.liquibase/Data_alias/basic/2019.2/changelog.xml
index 11cb1aee9e90be0b29f8bc45c229606df47af877..24be8bfd7806c7a47e07a29f87f4d2f8d4e8c3cb 100644
--- a/.liquibase/Data_alias/basic/2019.2/changelog.xml
+++ b/.liquibase/Data_alias/basic/2019.2/changelog.xml
@@ -132,4 +132,7 @@
 
     <include relativeToChangelogFile="true" file="update_Keyword_Essentials.xml" />
     <include relativeToChangelogFile="true" file="Contactmanagement_added_ImageBlobs.xml" />
+	
+    <include relativeToChangelogFile="true" file="alter_activityLink_notDerby.xml" />
+    <include relativeToChangelogFile="true" file="alter_activityLink_Derby.xml" />
 </databaseChangeLog>
diff --git a/aliasDefinition/Data_alias/Data_alias.aod b/aliasDefinition/Data_alias/Data_alias.aod
index 230be26a321e2541eef2985e4940537fa882f55c..c50f192679ff97b3beea99f68fe1ed62fa10c59e 100644
--- a/aliasDefinition/Data_alias/Data_alias.aod
+++ b/aliasDefinition/Data_alias/Data_alias.aod
@@ -4837,12 +4837,12 @@
                 <name>ACTIVITY_ID</name>
                 <dbName></dbName>
                 <primaryKey v="false" />
-                <columnType v="12" />
-                <size v="63" />
+                <columnType v="1" />
+                <size v="36" />
                 <scale v="0" />
-                <notNull v="true" />
+                <notNull v="false" />
                 <isUnique v="false" />
-                <index v="true" />
+                <index v="false" />
                 <documentation></documentation>
                 <title></title>
                 <description></description>