diff --git a/healthlink-his-server/healthlink-his-application/src/main/resources/db/migration/V42__bug745_fix_mr_sealing_medical_record_id.sql b/healthlink-his-server/healthlink-his-application/src/main/resources/db/migration/V42__bug745_fix_mr_sealing_medical_record_id.sql
new file mode 100644
index 000000000..bac15a6ea
--- /dev/null
+++ b/healthlink-his-server/healthlink-his-application/src/main/resources/db/migration/V42__bug745_fix_mr_sealing_medical_record_id.sql
@@ -0,0 +1,3 @@
+-- DEPRECATED: 本迁移已迁移至 V45__bug745_fix_mr_sealing_medical_record_id.sql
+-- 原因：与 V42__add_delete_flag_columns.sql 版本号重复，导致 Flyway 阻塞
+-- 此文件保留为空操作以避免 Flyway 校验错误
diff --git a/healthlink-his-server/healthlink-his-application/src/main/resources/db/migration/V45__bug745_fix_mr_sealing_medical_record_id.sql b/healthlink-his-server/healthlink-his-application/src/main/resources/db/migration/V45__bug745_fix_mr_sealing_medical_record_id.sql
new file mode 100644
index 000000000..6b605dbce
--- /dev/null
+++ b/healthlink-his-server/healthlink-his-application/src/main/resources/db/migration/V45__bug745_fix_mr_sealing_medical_record_id.sql
@@ -0,0 +1,5 @@
+-- Bug #745: mr_sealing.medical_record_id NOT NULL 导致前端不传该字段时 INSERT 报错
+-- 封存业务通过病案号手动录入，medicalRecordId 非必需，改为可空
+-- 说明：原 V42__bug745 因与 V42__add_delete_flag_columns 版本号冲突导致 Flyway 阻塞，
+--       迁移至 V45 以恢复 Flyway 正常执行
+ALTER TABLE mr_sealing ALTER COLUMN medical_record_id DROP NOT NULL;