diff --git a/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/6_6_0/4630-instance-default-update-time.yaml b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/6_6_0/4630-instance-default-update-time.yaml
new file mode 100644
index 00000000000..f3dbaea3b0a
--- /dev/null
+++ b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/6_6_0/4630-instance-default-update-time.yaml
@@ -0,0 +1,4 @@
+---
+type: fix
+issue: 4630
+title: "Default values are provided for the new UPDATE_TIME columns so batch jobs started before an upgrade can complete."
diff --git a/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java b/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java
index 9679089610a..886a5d7d555 100644
--- a/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java
+++ b/hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java
@@ -175,6 +175,14 @@ public class HapiFhirJpaMigrationTasks extends BaseMigrationTasks<VersionEnum> {
 			.nullable()
 			.type(ColumnTypeEnum.DATE_TIMESTAMP);
 
+		version.executeRawSql("20230397.1",
+			"update BT2_JOB_INSTANCE " +
+				"set UPDATE_TIME = coalesce(end_time, start_time, create_time, TIMESTAMP '2023-01-01 00:00:00') " +
+				"where UPDATE_TIME is null;");
+		version.executeRawSql("20230397.2",
+			"update bt2_work_chunk  " +
+				"set UPDATE_TIME = coalesce(end_time, start_time, create_time, TIMESTAMP '2023-01-01 00:00:00') " +
+				"where UPDATE_TIME is null;");
 
 	}