diff --git a/api/src/main/resources/liquibase.xml b/api/src/main/resources/liquibase.xml
index 8447862..4d6a992 100644
--- a/api/src/main/resources/liquibase.xml
+++ b/api/src/main/resources/liquibase.xml
@@ -347,5 +347,14 @@
         </createIndex>
     </changeSet>
 
+    <changeSet id="add_foreignKey_constraint_to_cohort_type_id" author="manojll">
+        <preConditions>
+            <columnExists tableName="cohort" columnName="cohort_type_id"/>
+        </preConditions>
+        <addForeignKeyConstraint baseTableName="cohort" baseColumnNames="cohort_type_id"
+                constraintName="cohort_cohort_type_fk" referencedTableName="cohort_type" referencedColumnNames="cohort_type_id"
+                onDelete="RESTRICT" />
+    </changeSet>
+
     <include file="liquibase/3.x-liquibase-changeSet.xml"/>
 </databaseChangeLog>
diff --git a/api/src/test/java/org/openmrs/module/cohort/api/dao/CohortTypeGenericDaoTest.java b/api/src/test/java/org/openmrs/module/cohort/api/dao/CohortTypeGenericDaoTest.java
index 004f937..8975734 100644
--- a/api/src/test/java/org/openmrs/module/cohort/api/dao/CohortTypeGenericDaoTest.java
+++ b/api/src/test/java/org/openmrs/module/cohort/api/dao/CohortTypeGenericDaoTest.java
@@ -13,7 +13,10 @@
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
 
+import org.hibernate.exception.ConstraintViolationException;
 import org.junit.Before;
 import org.junit.Test;
 import org.openmrs.api.context.Context;
@@ -24,6 +27,7 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
 
+
 public class CohortTypeGenericDaoTest extends BaseModuleContextSensitiveTest {
 	
 	private static final String COHORT_TYPE_INITIAL_TEST_DATA_XML = "org/openmrs/module/cohort/api/hibernate/db/CohortTypeDaoTest_initialTestData.xml";
@@ -79,4 +83,21 @@ public void shouldVoidCohortType() {
 		assertThat(voidedCohortType, nullValue());
 	}
 	
+	@Test
+	public void shouldPurgeCohortType() {
+		CohortType cohortType = dao.get(COHORT_TYPE_UUID);
+		assertNotNull(cohortType);
+		dao.delete(cohortType);
+		CohortType afterAttemptPurge = dao.get(COHORT_TYPE_UUID);
+		assertNull(afterAttemptPurge);
+	}
+	
+	@Test(expected = ConstraintViolationException.class)
+	public void shouldThrowExceptionForPurgeCohortType() {
+		CohortType cohortType = dao.get("94517bf9-d9d6-4726-b4f1-a2dff6b36e2d");
+		assertNotNull(cohortType);
+		dao.delete(cohortType);
+		Context.flushSession();
+	}
+	
 }
diff --git a/api/src/test/resources/org/openmrs/module/cohort/api/hibernate/db/CohortTypeDaoTest_initialTestData.xml b/api/src/test/resources/org/openmrs/module/cohort/api/hibernate/db/CohortTypeDaoTest_initialTestData.xml
index d771c73..a57715f 100644
--- a/api/src/test/resources/org/openmrs/module/cohort/api/hibernate/db/CohortTypeDaoTest_initialTestData.xml
+++ b/api/src/test/resources/org/openmrs/module/cohort/api/hibernate/db/CohortTypeDaoTest_initialTestData.xml
@@ -9,6 +9,16 @@
     graphic logo is a trademark of OpenMRS Inc.
 -->
 <dataset>
+    <location location_id="101" name="Cohort-21 Location" creator="1" date_created="2021-10-14 00:00:00.0" retired="false"
+              uuid="65ab9667-7435-49af-8be8-65a4b58fc78k"/>
+
     <cohort_type cohort_type_id="101" name="cohort type name" description="cohort type description" creator="1"
                  date_created="2005-01-01 00:00:00.0" voided="false" uuid="94517bf9-d8d7-4726-b4f1-a2dff6b36e2d"/>
+
+    <cohort_type cohort_type_id="102" name="cohort type 2" description="cohort type description" creator="1"
+                 date_created="2005-01-01 00:00:00.0" voided="false" uuid="94517bf9-d9d6-4726-b4f1-a2dff6b36e2d"/>
+
+    <cohort cohort_id="12" name="COVID-20 patients" description="COVID-19 patients" is_group_cohort="0" creator="1"
+            definition_handler="org.openmrs.module.cohort.definition.handler.DefaultCohortDefinitionHandler"
+            location_id="101" cohort_type_id="102" date_created="2005-01-01 00:00:00.0" voided="false" uuid="8f9a2479-c14a-4bfc-bcaa-632860258519"/>
 </dataset>