diff --git a/.liquibase/Data_alias/basic/2020.2.2/alter_CampaignParticipantResponsibleIndex.xml b/.liquibase/Data_alias/basic/2020.2.2/alter_CampaignParticipantResponsibleIndex.xml
new file mode 100644
index 0000000000000000000000000000000000000000..6360542b2dff79630a5591fcbd5f4b8b2287ad87
--- /dev/null
+++ b/.liquibase/Data_alias/basic/2020.2.2/alter_CampaignParticipantResponsibleIndex.xml
@@ -0,0 +1,10 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.6.xsd">
+  <changeSet author="a.voegl" id="6d545d51-b838-4325-9573-5fe51eade79b">
+        <createIndex indexName="IDX_CAMPAIGNPART_RES_CONTACT" tableName="CAMPAIGNPARTICIPANT">
+            <column name="RESPONSIBLE_CONTACT_ID"/>
+        </createIndex>
+  </changeSet>
+</databaseChangeLog>
\ No newline at end of file
diff --git a/.liquibase/Data_alias/basic/2020.2.2/changelog.xml b/.liquibase/Data_alias/basic/2020.2.2/changelog.xml
index 302d930f6b09cf8b2828ace28753b097d44bd668..2a4bea7a4e0949d9504cea14b44a0f11cf14b25d 100644
--- a/.liquibase/Data_alias/basic/2020.2.2/changelog.xml
+++ b/.liquibase/Data_alias/basic/2020.2.2/changelog.xml
@@ -6,6 +6,7 @@
     <include relativeToChangelogFile="true" file="insert_employeeCountAttribute.xml"/>
     <include relativeToChangelogFile="true" file="alter_CampaignParticipantResponsible.xml"/>
     <include relativeToChangelogFile="true" file="alter_TableLeadStatus.xml"/>
+    <include relativeToChangelogFile="true" file="alter_CampaignParticipantResponsibleIndex.xml"/>
     <include relativeToChangelogFile="true" file="MSTeams/changelog.xml"/>
     <include relativeToChangelogFile="true" file="insert_newsletterAttribute.xml"/>
     <include relativeToChangelogFile="true" file="readd_ExporttemplateIndizes.xml"/>
diff --git a/process/Sql_lib/process.js b/process/Sql_lib/process.js
index d4d8afdaa40296cadc2c172ef2e077dc8575e066..08f4d90d0b5c4467a554ae6f1b4003ffbdb5f832 100644
--- a/process/Sql_lib/process.js
+++ b/process/Sql_lib/process.js
@@ -4253,10 +4253,11 @@ SqlUtils.getSqlInStatement = function(pFieldname, pData, pQuoteSymbol, pAsPrepar
 }
 
 /**
-* resolves key-value pairs (of strings) into a case when expression
+* resolves key-value pairs (of strings) into a case when expression; 
+* This function tries to get the columntype for better type comparison
 * 
 * @param {String[][]} pKeyValueArray you've to pass a 2D-Array where each element has at pos0 the key and pos1 the value
-* @param {String} pDbFieldName name fo the database field where the KEY-value is stored
+* @param {String} pDbFieldName name fo the database field where the KEY-value is stored; prefers TABLENAME.COLUMNNAME
 * @param {String} [pLocale=current client language] specifies the locale for translating the title; can be false if nothing shalle be translated
 * 
 * @return {String} a SQL-expression (case-when-statement) that resolves the KEYID into the title -> as preparedSatement-elements
@@ -4278,7 +4279,13 @@ SqlUtils.getResolvingCaseWhen = function(pKeyValueArray, pDbFieldName, pLocale)
     };
     //!SqlBuilder
     var resSql = "case ", preparedValues = [];
-    var colTypeKeyId = SQLTYPES.CHAR;
+    
+    var colTypeKeyId = SQLTYPES.CHAR; //the standard type is char
+    var fields = SqlUtils._parseFieldQualifier(pDbFieldName); //validate the DB-field for proper form (CONTACT.CONTACTID)
+    if (!(fields instanceof TypeError))
+        colTypeKeyId = SqlUtils.getSingleColumnType(pDbFieldName, undefined, this.alias); 
+     //some databases dont auto cast on their own so we need the proper type
+    
     var colTypeTitle = SQLTYPES.NVARCHAR;
     for (var i = 0, l = keyData.length; i < l; i++) 
     {