hard code key cache
diff --git a/.github/workflows/pr-validation.yml b/.github/workflows/pr-validation.yml
index 6c97848..98bea07 100644
--- a/.github/workflows/pr-validation.yml
+++ b/.github/workflows/pr-validation.yml
@@ -36,8 +36,8 @@
        uses: actions/cache@v2
        with:
           path: ~/.m2
-          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
-          restore-keys: ${{ runner.os }}-m2
+          key: 'cache'
+          restore-keys: 'cache'
       - name: Build with Maven
         run: mvn -B package --file pom.xml
       - name: Remove Snapshots Before Caching