diff --git a/package.json b/package.json
index 37c9e582..a9271ddf 100755
--- a/package.json
+++ b/package.json
@@ -12,7 +12,8 @@
     "build": "pnpm -r do-build",
     "rm": "find ./ -type d \\( -name \"dist\" -o -name \"node_modules\" \\) -exec rm -rf {} +",
     "preinstall": "node ./scripts/check.js",
-    "prepare": "husky"
+    "prepare": "husky",
+    "migrate": "pnpm dlx prisma migrate dev --schema ./packages/canyon-backend/prisma/schema.prisma"
   },
   "devDependencies": {
     "@commitlint/cli": "^19.2.1",
diff --git a/packages/canyon-backend/package.json b/packages/canyon-backend/package.json
index 95ff5dc6..0ce58a27 100755
--- a/packages/canyon-backend/package.json
+++ b/packages/canyon-backend/package.json
@@ -48,7 +48,7 @@
     "mongoose": "^8.4.4",
     "passport-jwt": "^4.0.1",
     "passport-local": "^1.0.0",
-    "prisma": "^5.16.1",
+    "prisma": "5.16.1",
     "reflect-metadata": "^0.1.14",
     "rxjs": "^7.8.1",
     "test-exclude": "^6.0.0",
@@ -58,7 +58,7 @@
   "devDependencies": {
     "@nestjs/cli": "^10.3.2",
     "@nestjs/schematics": "^10.1.1",
-    "@prisma/client": "^5.16.1",
+    "@prisma/client": "5.16.1",
     "@types/express": "^4.17.21",
     "@types/istanbul-lib-coverage": "^2.0.6",
     "@types/istanbul-lib-source-maps": "^4.0.4",
diff --git a/packages/canyon-backend/prisma/migrations/20240524055658_add_filepath/migration.sql b/packages/canyon-backend/prisma/migrations/20240524055658_add_filepath/migration.sql
deleted file mode 100644
index 100dcfcd..00000000
--- a/packages/canyon-backend/prisma/migrations/20240524055658_add_filepath/migration.sql
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
-  Warnings:
-
-  - Added the required column `language` to the `project` table without a default value. This is not possible if the table is not empty.
-
-*/
--- AlterTable
-ALTER TABLE "project" ADD COLUMN     "language" TEXT NOT NULL;
-
--- CreateTable
-CREATE TABLE "filepath" (
-    "id" TEXT NOT NULL,
-    "project_id" TEXT NOT NULL,
-    "sha" TEXT NOT NULL,
-    "path" TEXT NOT NULL,
-
-    CONSTRAINT "filepath_pkey" PRIMARY KEY ("id")
-);
diff --git a/packages/canyon-backend/prisma/migrations/20240531030159_in/migration.sql b/packages/canyon-backend/prisma/migrations/20240531030159_in/migration.sql
deleted file mode 100644
index f644d6bd..00000000
--- a/packages/canyon-backend/prisma/migrations/20240531030159_in/migration.sql
+++ /dev/null
@@ -1,10 +0,0 @@
-/*
-  Warnings:
-
-  - You are about to drop the column `tag` on the `project` table. All the data in the column will be lost.
-  - Added the required column `members` to the `project` table without a default value. This is not possible if the table is not empty.
-
-*/
--- AlterTable
-ALTER TABLE "project" DROP COLUMN "tag",
-ADD COLUMN     "members" JSONB NOT NULL;
diff --git a/packages/canyon-backend/prisma/migrations/20240523025701_init/migration.sql b/packages/canyon-backend/prisma/migrations/20240726055230_init/migration.sql
similarity index 90%
rename from packages/canyon-backend/prisma/migrations/20240523025701_init/migration.sql
rename to packages/canyon-backend/prisma/migrations/20240726055230_init/migration.sql
index 17183cdb..ca8e9795 100644
--- a/packages/canyon-backend/prisma/migrations/20240523025701_init/migration.sql
+++ b/packages/canyon-backend/prisma/migrations/20240726055230_init/migration.sql
@@ -79,10 +79,12 @@ CREATE TABLE "project" (
     "path_with_namespace" TEXT NOT NULL,
     "description" TEXT NOT NULL,
     "bu" TEXT NOT NULL,
-    "tag" TEXT NOT NULL,
     "tags" JSONB NOT NULL,
+    "members" JSONB NOT NULL,
     "coverage" TEXT NOT NULL,
+    "language" TEXT NOT NULL,
     "default_branch" TEXT NOT NULL,
+    "instrument_cwd" TEXT NOT NULL,
     "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
 
     CONSTRAINT "project_pkey" PRIMARY KEY ("id")
@@ -102,6 +104,16 @@ CREATE TABLE "codechange" (
     CONSTRAINT "codechange_pkey" PRIMARY KEY ("id")
 );
 
+-- CreateTable
+CREATE TABLE "filepath" (
+    "id" TEXT NOT NULL,
+    "project_id" TEXT NOT NULL,
+    "sha" TEXT NOT NULL,
+    "path" TEXT NOT NULL,
+
+    CONSTRAINT "filepath_pkey" PRIMARY KEY ("id")
+);
+
 -- CreateTable
 CREATE TABLE "distributedlock" (
     "lockName" TEXT NOT NULL,
diff --git a/packages/canyon-backend/src/utils/coverage.ts b/packages/canyon-backend/src/utils/coverage.ts
index acf1ccdf..38543d18 100755
--- a/packages/canyon-backend/src/utils/coverage.ts
+++ b/packages/canyon-backend/src/utils/coverage.ts
@@ -1,7 +1,7 @@
 import * as libCoverage from 'istanbul-lib-coverage';
 import * as libSourceMaps from 'istanbul-lib-source-maps';
 import {mergeCoverageMap as mergeCoverageMapOfCanyonData} from "@canyon/data";
-import {merge_coverage_json_str} from "canyon-data";
+// import {merge_coverage_json_str} from "canyon-data";
 function parseInstrumentCwd(instrumentCwd) {
   if (instrumentCwd.includes('=>')) {
     const instrumentCwdSplit = instrumentCwd.split('=>');
@@ -85,12 +85,5 @@ function getJsonSize(jsonObj) {
 
 
 export const mergeCoverageMap = (cov1: any, cov2: any) => {
-  // 超过2M的数据用js合并
-  const size = getJsonSize(cov1);
-  if (size > 0){
-    // console.log(`size of cov1: ${size}M`);
-    return mergeCoverageMapOfCanyonData(cov1, cov2)
-  } else {
-    return JSON.parse(merge_coverage_json_str(JSON.stringify(cov1), JSON.stringify(cov2)));
-  }
+  return mergeCoverageMapOfCanyonData(cov1, cov2)
 }