diff --git a/others/db_changes/data_alias/basic/2019.2/SalesProjectEstimation.xml b/others/db_changes/data_alias/basic/2019.2/SalesProjectEstimation.xml
deleted file mode 100644
index 740b8ccaf4323ccfc6a055e31a53f2c237f0830c..0000000000000000000000000000000000000000
--- a/others/db_changes/data_alias/basic/2019.2/SalesProjectEstimation.xml
+++ /dev/null
@@ -1,106 +0,0 @@
-<?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 author="a.voegl" id="41eb17e3-2e67-4d45-907a-a2762e29b50c">
-        <renameColumn newColumnName="ESTIMATIONVALUE_OLD" oldColumnName="ESTIMATIONVALUE" tableName="SALESPROJECT"/>
-	<addColumn tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" type="CHAR(36)"/>
-	</addColumn> 
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="c6c49da4-80dc-4c32-b5b0-c33eac27de7f"/>
-            <where>ESTIMATIONVALUE_OLD = 1</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="9237ee74-bb91-4333-8114-4485b35cf8d7"/>
-            <where>ESTIMATIONVALUE_OLD = 2</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="e3e16d06-1390-4d84-81bd-c495a401cc70"/>
-            <where>ESTIMATIONVALUE_OLD = 3</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="2ef3ac7d-72b8-43b3-9cc1-64ffdf43fe2f"/>
-            <where>ESTIMATIONVALUE_OLD = 4</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="4b322f3f-815e-442e-ac63-a983f3efca6b"/>
-            <where>ESTIMATIONVALUE_OLD = 5</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="3179371b-b647-4141-b575-3c26ce9f9213"/>
-            <where>ESTIMATIONVALUE_OLD = 6</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="3088256a-f247-40cb-ad4e-33892cbf5ca3"/>
-            <where>ESTIMATIONVALUE_OLD = 7</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="a2faa45e-bc7a-41f6-8130-7c7a636ddc9f"/>
-            <where>ESTIMATIONVALUE_OLD = 8</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="d2e97e88-77fd-4fdb-8d5e-30807e2a40e2"/>
-            <where>ESTIMATIONVALUE_OLD = 9</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="87fd87af-1cb6-40fb-843e-aee612862362"/>
-            <where>ESTIMATIONVALUE_OLD = 10</where>
-        </update>
-        <update tableName="SALESPROJECT">
-            <column name="ESTIMATIONVALUE" value="5de71df0-5086-49b8-bd72-a2c0a698e134"/>
-            <where>ESTIMATIONVALUE_OLD = 11</where>
-        </update>
-        <dropColumn tableName="SALESPROJECT" columnName="ESTIMATIONVALUE_OLD"/>
- 
-        <rollback>
-            <renameColumn newColumnName="ESTIMATIONVALUE_OLD" oldColumnName="ESTIMATIONVALUE" tableName="SALESPROJECT"/>
-            <addColumn tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" type="INTEGER"/>
-            </addColumn>   
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="1"/>
-                <where>ESTIMATIONVALUE_OLD = 'c6c49da4-80dc-4c32-b5b0-c33eac27de7f'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="2"/>
-                <where>ESTIMATIONVALUE_OLD = '9237ee74-bb91-4333-8114-4485b35cf8d7'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="3"/>
-                <where>ESTIMATIONVALUE_OLD = 'e3e16d06-1390-4d84-81bd-c495a401cc70'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="4"/>
-                <where>ESTIMATIONVALUE_OLD = '2ef3ac7d-72b8-43b3-9cc1-64ffdf43fe2f'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="5"/>
-                <where>ESTIMATIONVALUE_OLD = '4b322f3f-815e-442e-ac63-a983f3efca6b'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="6"/>
-                <where>ESTIMATIONVALUE_OLD = '3179371b-b647-4141-b575-3c26ce9f9213'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="7"/>
-                <where>ESTIMATIONVALUE_OLD = '3088256a-f247-40cb-ad4e-33892cbf5ca3'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="8"/>
-                <where>ESTIMATIONVALUE_OLD = 'a2faa45e-bc7a-41f6-8130-7c7a636ddc9f'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="9"/>
-                <where>ESTIMATIONVALUE_OLD = 'd2e97e88-77fd-4fdb-8d5e-30807e2a40e2'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="10"/>
-                <where>ESTIMATIONVALUE_OLD = '87fd87af-1cb6-40fb-843e-aee612862362'</where>
-            </update>
-            <update tableName="SALESPROJECT">
-                <column name="ESTIMATIONVALUE" valueNumeric="11"/>
-                <where>ESTIMATIONVALUE_OLD = '5de71df0-5086-49b8-bd72-a2c0a698e134'</where>
-            </update>
-            <dropColumn tableName="SALESPROJECT" columnName="ESTIMATIONVALUE_OLD"/>
-        </rollback>
-    </changeSet>
-</databaseChangeLog>
\ No newline at end of file
diff --git a/others/db_changes/data_alias/basic/2019.2/drop_estimation_salesproject.xml b/others/db_changes/data_alias/basic/2019.2/drop_estimation_salesproject.xml
new file mode 100644
index 0000000000000000000000000000000000000000..ab045eecb61425666f5f5a69642cb138dc77cbb5
--- /dev/null
+++ b/others/db_changes/data_alias/basic/2019.2/drop_estimation_salesproject.xml
@@ -0,0 +1,14 @@
+<?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 author="j.hoermann" id="0601eb26-fc5e-4b57-ad18-2b6a064f383f">
+        <dropColumn tableName="SALESPROJECT" columnName="ESTIMATION"/>
+        <dropColumn tableName="SALESPROJECT" columnName="ESTIMATIONVALUE"/>
+        
+        <rollback>
+            <addColumn tableName="SALESPROJECT">
+                <column name="ESTIMATION" type="NVARCHAR(50)"/>
+                <column name="ESTIMATIONVALUE" type="INTEGER"/>
+            </addColumn>
+        </rollback>
+    </changeSet>
+</databaseChangeLog>
\ No newline at end of file