diff --git a/backend/migrations/.frozen-sha256 b/backend/migrations/.frozen-sha256
index eb47e14c9..91831f0f8 100644
--- a/backend/migrations/.frozen-sha256
+++ b/backend/migrations/.frozen-sha256
@@ -36,6 +36,4 @@ bd73379456839e8a12d7591ad2a839901af0f5ba27871248569abdfa26bc83ef  0035_cpr_link_
 d05442ee4cb85db8131e015dbed9c6ad988f93306abcda34647317674857ee44  0036_account_display_names.sql
 b215ea90d5c8753aeb8192b17ffe65f7a95c1d620aaeaf9fc4337d8cf6f2634e  0037_retry_after_wait_limit.sql
 321f4a09367717eb13c3cf5dbfd1f4b014e31c615a74bf6e3b09b8e810d87198  0038_preserve_client_key_ledger.sql
-80ba91cad23667ace80a43daf905ca78fd0f6de5fb57f444c9ebbfa2fab90c34  0039_queue_timeouts.sql
-2438e107835cd69effdb37e4d008b3b631a287da9e41185b04dd239449cb6733  0040_quota_credit_policy.sql
-825b9144f369eca39439d7da27f477915bd904c3df90940108d8a37fcc129bac  0041_client_key_installation_seed.sql
+a6b4e81d38e5d70776a75eba22749354573ebcb186160ff9eb45fd91157b3e0d  0039_queue_timeouts_quota_credits_and_installation_seed.sql
diff --git a/backend/migrations/0039_queue_timeouts.sql b/backend/migrations/0039_queue_timeouts.sql
deleted file mode 100644
index e3e804359..000000000
--- a/backend/migrations/0039_queue_timeouts.sql
+++ /dev/null
@@ -1,10 +0,0 @@
--- 两层排队分别沿用实例已配置的时限，账号队满或超时默认返回错误
-ALTER TABLE runtime_settings
-    RENAME COLUMN concurrency_wait_timeout_seconds TO key_queue_timeout_seconds;
-
-ALTER TABLE runtime_settings
-    ADD COLUMN account_queue_timeout_seconds BIGINT NOT NULL DEFAULT 30
-        CHECK (account_queue_timeout_seconds BETWEEN 1 AND 120),
-    ADD COLUMN switch_account_on_queue_failure BOOLEAN NOT NULL DEFAULT FALSE;
-
-UPDATE runtime_settings SET account_queue_timeout_seconds = key_queue_timeout_seconds;
diff --git a/backend/migrations/0039_queue_timeouts_quota_credits_and_installation_seed.sql b/backend/migrations/0039_queue_timeouts_quota_credits_and_installation_seed.sql
new file mode 100644
index 000000000..121a33c39
--- /dev/null
+++ b/backend/migrations/0039_queue_timeouts_quota_credits_and_installation_seed.sql
@@ -0,0 +1,71 @@
+-- 两层排队分别沿用实例已配置的时限，账号队满或超时默认返回错误
+ALTER TABLE runtime_settings
+    RENAME COLUMN concurrency_wait_timeout_seconds TO key_queue_timeout_seconds;
+
+ALTER TABLE runtime_settings
+    ADD COLUMN account_queue_timeout_seconds BIGINT NOT NULL DEFAULT 30
+        CHECK (account_queue_timeout_seconds BETWEEN 1 AND 120),
+    ADD COLUMN switch_account_on_queue_failure BOOLEAN NOT NULL DEFAULT FALSE;
+
+UPDATE runtime_settings SET account_queue_timeout_seconds = key_queue_timeout_seconds;
+
+alter table provider_accounts
+  add column auto_use_quota_credits boolean not null default false,
+  drop constraint provider_accounts_quota_evidence_ck,
+  drop constraint provider_accounts_quota_fact_ck,
+  add constraint provider_accounts_quota_evidence_ck check (
+    quota_evidence in ('provider_denied', 'account_limit_reached', 'usage_limit_reached', 'payment_required', 'credits_available')
+  ),
+  add constraint provider_accounts_quota_fact_ck check (
+    (quota_access_state = 'unknown' and quota_evidence is null and quota_reset_at is null)
+    or (quota_access_state = 'allowed' and quota_access_observed_at is not null
+      and ((quota_evidence is null and quota_reset_at is null) or quota_evidence is not distinct from 'credits_available'))
+    or (quota_access_state = 'exhausted' and quota_evidence is not null and quota_evidence <> 'credits_available' and quota_access_observed_at is not null)
+  );
+
+-- 在行锁内按当前配置投影仅点数可用的观测，晚返回的查询不能覆盖关闭开关的决定
+create function apply_quota_credit_policy() returns trigger language plpgsql as $$
+begin
+  new.quota_access_state := 'exhausted';
+  new.quota_evidence := 'account_limit_reached';
+  return new;
+end
+$$;
+
+create trigger provider_accounts_quota_credit_policy
+before insert or update of auto_use_quota_credits, quota_evidence, quota_access_state on provider_accounts
+for each row when (not new.auto_use_quota_credits and new.quota_evidence = 'credits_available') execute function apply_quota_credit_policy();
+
+-- Key 安装身份只保存种子，现有安装 ID 转为种子后按 Key 与账号重新派生
+WITH migrated AS (
+    UPDATE client_api_keys
+    SET provider_request_profiles_json = jsonb_set(
+        provider_request_profiles_json,
+        '{openai}',
+        CASE
+            WHEN provider_request_profiles_json #> '{openai,inherit}' ? 'installationId'
+            THEN jsonb_set(
+                provider_request_profiles_json -> 'openai',
+                '{inherit}',
+                ((provider_request_profiles_json #> '{openai,inherit}') - 'installationId')
+                || jsonb_build_object(
+                    'installationSeed',
+                    provider_request_profiles_json #> '{openai,inherit,installationId}'
+                )
+            )
+            ELSE ((provider_request_profiles_json -> 'openai') - 'installationId')
+                || jsonb_build_object(
+                    'installationSeed',
+                    provider_request_profiles_json #> '{openai,installationId}'
+                )
+        END
+    ),
+    updated_at = GREATEST(now(), updated_at)
+    WHERE provider_request_profiles_json -> 'openai' ? 'installationId'
+       OR provider_request_profiles_json #> '{openai,inherit}' ? 'installationId'
+    RETURNING id
+)
+UPDATE runtime_settings
+SET config_revision = config_revision + 1,
+    updated_at = GREATEST(now(), updated_at)
+WHERE EXISTS (SELECT 1 FROM migrated);
diff --git a/backend/migrations/0040_quota_credit_policy.sql b/backend/migrations/0040_quota_credit_policy.sql
deleted file mode 100644
index ae4525ad4..000000000
--- a/backend/migrations/0040_quota_credit_policy.sql
+++ /dev/null
@@ -1,26 +0,0 @@
-alter table provider_accounts
-  add column auto_use_quota_credits boolean not null default false,
-  drop constraint provider_accounts_quota_evidence_ck,
-  drop constraint provider_accounts_quota_fact_ck,
-  add constraint provider_accounts_quota_evidence_ck check (
-    quota_evidence in ('provider_denied', 'account_limit_reached', 'usage_limit_reached', 'payment_required', 'credits_available')
-  ),
-  add constraint provider_accounts_quota_fact_ck check (
-    (quota_access_state = 'unknown' and quota_evidence is null and quota_reset_at is null)
-    or (quota_access_state = 'allowed' and quota_access_observed_at is not null
-      and ((quota_evidence is null and quota_reset_at is null) or quota_evidence is not distinct from 'credits_available'))
-    or (quota_access_state = 'exhausted' and quota_evidence is not null and quota_evidence <> 'credits_available' and quota_access_observed_at is not null)
-  );
-
--- 在行锁内按当前配置投影仅点数可用的观测，晚返回的查询不能覆盖关闭开关的决定
-create function apply_quota_credit_policy() returns trigger language plpgsql as $$
-begin
-  new.quota_access_state := 'exhausted';
-  new.quota_evidence := 'account_limit_reached';
-  return new;
-end
-$$;
-
-create trigger provider_accounts_quota_credit_policy
-before insert or update of auto_use_quota_credits, quota_evidence, quota_access_state on provider_accounts
-for each row when (not new.auto_use_quota_credits and new.quota_evidence = 'credits_available') execute function apply_quota_credit_policy();
diff --git a/backend/migrations/0041_client_key_installation_seed.sql b/backend/migrations/0041_client_key_installation_seed.sql
deleted file mode 100644
index 00f2f3a5c..000000000
--- a/backend/migrations/0041_client_key_installation_seed.sql
+++ /dev/null
@@ -1,33 +0,0 @@
--- Key 安装身份只保存种子，现有安装 ID 转为种子后按 Key 与账号重新派生
-WITH migrated AS (
-    UPDATE client_api_keys
-    SET provider_request_profiles_json = jsonb_set(
-        provider_request_profiles_json,
-        '{openai}',
-        CASE
-            WHEN provider_request_profiles_json #> '{openai,inherit}' ? 'installationId'
-            THEN jsonb_set(
-                provider_request_profiles_json -> 'openai',
-                '{inherit}',
-                ((provider_request_profiles_json #> '{openai,inherit}') - 'installationId')
-                || jsonb_build_object(
-                    'installationSeed',
-                    provider_request_profiles_json #> '{openai,inherit,installationId}'
-                )
-            )
-            ELSE ((provider_request_profiles_json -> 'openai') - 'installationId')
-                || jsonb_build_object(
-                    'installationSeed',
-                    provider_request_profiles_json #> '{openai,installationId}'
-                )
-        END
-    ),
-    updated_at = GREATEST(now(), updated_at)
-    WHERE provider_request_profiles_json -> 'openai' ? 'installationId'
-       OR provider_request_profiles_json #> '{openai,inherit}' ? 'installationId'
-    RETURNING id
-)
-UPDATE runtime_settings
-SET config_revision = config_revision + 1,
-    updated_at = GREATEST(now(), updated_at)
-WHERE EXISTS (SELECT 1 FROM migrated);