Caused by: java.sql.SQLSyntaxErrorException: (conn=1883) Unknown column 'gradableObject' in 'where clause'
	at org.mariadb.jdbc.internal.util.exceptions.ExceptionFactory.createException(ExceptionFactory.java:62) ~[mariadb-java-client-2.7.4.jar:?]
	at org.mariadb.jdbc.internal.util.exceptions.ExceptionFactory.create(ExceptionFactory.java:158) ~[mariadb-java-client-2.7.4.jar:?]
	at org.mariadb.jdbc.MariaDbStatement.executeExceptionEpilogue(MariaDbStatement.java:266) ~[mariadb-java-client-2.7.4.jar:?]
	at org.mariadb.jdbc.ClientSidePreparedStatement.executeInternal(ClientSidePreparedStatement.java:229) ~[mariadb-java-client-2.7.4.jar:?]
	at org.mariadb.jdbc.ClientSidePreparedStatement.execute(ClientSidePreparedStatement.java:149) ~[mariadb-java-client-2.7.4.jar:?]
	at org.mariadb.jdbc.ClientSidePreparedStatement.executeUpdate(ClientSidePreparedStatement.java:181) ~[mariadb-java-client-2.7.4.jar:?]
	at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeUpdate(ProxyPreparedStatement.java:61) ~[HikariCP-4.0.3.jar:?]
	at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeUpdate(HikariProxyPreparedStatement.java) ~[HikariCP-4.0.3.jar:?]
	at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:175) ~[hibernate-core-5.3.20.Final.jar:5.3.20.Final]
	at org.hibernate.hql.internal.ast.exec.BasicExecutor.doExecute(BasicExecutor.java:100) ~[hibernate-core-5.3.20.Final.jar:5.3.20.Final]
	at org.hibernate.hql.internal.ast.exec.BasicExecutor.execute(BasicExecutor.java:59) ~[hibernate-core-5.3.20.Final.jar:5.3.20.Final]
	at org.hibernate.hql.internal.ast.exec.DeleteExecutor.execute(DeleteExecutor.java:109) ~[hibernate-core-5.3.20.Final.jar:5.3.20.Final]
	at org.hibernate.hql.internal.ast.QueryTranslatorImpl.executeUpdate(QueryTranslatorImpl.java:453) ~[hibernate-core-5.3.20.Final.jar:5.3.20.Final]
	at org.hibernate.engine.query.spi.HQLQueryPlan.performExecuteUpdate(HQLQueryPlan.java:378) ~[hibernate-core-5.3.20.Final.jar:5.3.20.Final]
	at org.hibernate.internal.SessionImpl.executeUpdate(SessionImpl.java:1550) ~[hibernate-core-5.3.20.Final.jar:5.3.20.Final]
	at org.hibernate.query.internal.AbstractProducedQuery.doExecuteUpdate(AbstractProducedQuery.java:1663) ~[hibernate-core-5.3.20.Final.jar:5.3.20.Final]
	at org.hibernate.query.internal.AbstractProducedQuery.executeUpdate(AbstractProducedQuery.java:1645) ~[hibernate-core-5.3.20.Final.jar:5.3.20.Final]
	at org.sakaiproject.component.gradebook.GradebookExternalAssessmentServiceImpl.lambda$removeExternalAssessment$1(GradebookExternalAssessmentServiceImpl.java:281) ~[?:?]
	at org.springframework.orm.hibernate5.HibernateTemplate.doExecute(HibernateTemplate.java:367) ~[spring-orm-5.3.9.jar:5.3.9]
	at org.springframework.orm.hibernate5.HibernateTemplate.execute(HibernateTemplate.java:320) ~[spring-orm-5.3.9.jar:5.3.9]
	at org.sakaiproject.component.gradebook.GradebookExternalAssessmentServiceImpl.removeExternalAssessment(GradebookExternalAssessmentServiceImpl.java:273) ~[?:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?]
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
	at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.3.9.jar:5.3.9]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.3.9.jar:5.3.9]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.3.9.jar:5.3.9]
	at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) ~[spring-tx-5.3.9.jar:5.3.9]
	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388) ~[spring-tx-5.3.9.jar:5.3.9]
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-5.3.9.jar:5.3.9]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.9.jar:5.3.9]
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.9.jar:5.3.9]
	at com.sun.proxy.$Proxy193.removeExternalAssessment(Unknown Source) ~[?:?]
	at org.sakaiproject.assignment.impl.AssignmentServiceImpl.removeAssociatedGradebookItem(AssignmentServiceImpl.java:3164) ~[?:?]
	at org.sakaiproject.assignment.impl.AssignmentServiceImpl.deleteAssignmentAndAllReferences(AssignmentServiceImpl.java:1215) ~[?:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?]
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
	at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.3.9.jar:5.3.9]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.3.9.jar:5.3.9]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.3.9.jar:5.3.9]
	at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) ~[spring-tx-5.3.9.jar:5.3.9]
	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388) ~[spring-tx-5.3.9.jar:5.3.9]
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-5.3.9.jar:5.3.9]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.9.jar:5.3.9]
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.9.jar:5.3.9]
	at com.sun.proxy.$Proxy253.deleteAssignmentAndAllReferences(Unknown Source) ~[?:?]
	at org.sakaiproject.assignment.tool.AssignmentAction.deleteAssignmentObjects(AssignmentAction.java:10142) ~[classes/:?]
	at org.sakaiproject.assignment.tool.AssignmentAction.doDelete_assignment(AssignmentAction.java:10112) ~[classes/:?]