diff --git a/lib/dependency-caching.js b/lib/dependency-caching.js
index cf682babad..3553c6870d 100644
--- a/lib/dependency-caching.js
+++ b/lib/dependency-caching.js
@@ -147,8 +147,23 @@ async function uploadDependencyCaches(config, logger) {
             continue;
         }
         const key = await cacheKey(language, cacheConfig);
-        logger.info(`Uploading cache of size ${size} for ${language} with key ${key}`);
-        await actionsCache.saveCache(cacheConfig.paths, key);
+        logger.info(`Uploading cache of size ${size} for ${language} with key ${key}...`);
+        try {
+            await actionsCache.saveCache(cacheConfig.paths, key);
+        }
+        catch (error) {
+            // `ReserveCacheError` indicates that the cache key is already in use, which means that a
+            // cache with that key already exists or is in the process of being uploaded by another
+            // workflow. We can ignore this.
+            if (error instanceof actionsCache.ReserveCacheError) {
+                logger.info(`Not uploading cache for ${language}, because ${key} is already in use.`);
+                logger.debug(error.message);
+            }
+            else {
+                // Propagate other errors upwards.
+                throw error;
+            }
+        }
     }
 }
 /**
diff --git a/lib/dependency-caching.js.map b/lib/dependency-caching.js.map
index 2dd4e1e239..d64d6b117f 100644
--- a/lib/dependency-caching.js.map
+++ b/lib/dependency-caching.js.map
@@ -1 +1 @@
-{"version":3,"file":"dependency-caching.js","sourceRoot":"","sources":["../src/dependency-caching.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;AA+EA,4DAmDC;AAQD,wDAkDC;AA5LD,uCAAyB;AACzB,+BAA4B;AAE5B,6DAA+C;AAC/C,oDAAsC;AAEtC,mDAAoD;AAEpD,+CAAuC;AAGvC,iCAA6C;AAgB7C,MAAM,8BAA8B,GAAG,qBAAqB,CAAC;AAC7D,MAAM,+BAA+B,GAAG,CAAC,CAAC;AAE1C;;GAEG;AACH,MAAM,2BAA2B,GAAwC;IACvE,IAAI,EAAE;QACJ,KAAK,EAAE;YACL,QAAQ;YACR,IAAA,WAAI,EAAC,EAAE,CAAC,OAAO,EAAE,EAAE,KAAK,EAAE,YAAY,CAAC;YACvC,SAAS;YACT,IAAA,WAAI,EAAC,EAAE,CAAC,OAAO,EAAE,EAAE,SAAS,EAAE,QAAQ,CAAC;SACxC;QACD,IAAI,EAAE;YACJ,QAAQ;YACR,YAAY;YACZ,SAAS;YACT,cAAc;YACd,8BAA8B;YAC9B,yBAAyB;YACzB,6BAA6B;YAC7B,wBAAwB;YACxB,wBAAwB;SACzB;KACF;IACD,MAAM,EAAE;QACN,KAAK,EAAE,CAAC,IAAA,WAAI,EAAC,EAAE,CAAC,OAAO,EAAE,EAAE,QAAQ,EAAE,UAAU,CAAC,CAAC;QACjD,IAAI,EAAE;YACJ,QAAQ;YACR,uBAAuB;YACvB,QAAQ;YACR,eAAe;SAChB;KACF;IACD,EAAE,EAAE;QACF,KAAK,EAAE,CAAC,IAAA,WAAI,EAAC,EAAE,CAAC,OAAO,EAAE,EAAE,IAAI,EAAE,KAAK,EAAE,KAAK,CAAC,CAAC;QAC/C,IAAI,EAAE,CAAC,WAAW,CAAC;KACpB;CACF,CAAC;AAEF,KAAK,UAAU,WAAW,CAAC,QAAkB;IAC3C,OAAO,IAAI,CAAC,MAAM,CAAC,QAAQ,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC;AAC1C,CAAC;AAED;;;;;;GAMG;AACI,KAAK,UAAU,wBAAwB,CAC5C,SAAqB,EACrB,MAAc;IAEd,MAAM,cAAc,GAAe,EAAE,CAAC;IAEtC,KAAK,MAAM,QAAQ,IAAI,SAAS,EAAE,CAAC;QACjC,MAAM,WAAW,GAAG,2BAA2B,CAAC,QAAQ,CAAC,CAAC;QAE1D,IAAI,WAAW,KAAK,SAAS,EAAE,CAAC;YAC9B,MAAM,CAAC,IAAI,CACT,6CAA6C,QAAQ,8CAA8C,CACpG,CAAC;YACF,SAAS;QACX,CAAC;QAED,gGAAgG;QAChG,wBAAwB;QACxB,MAAM,OAAO,GAAG,MAAM,WAAW,CAAC,WAAW,CAAC,IAAI,CAAC,CAAC;QAEpD,IAAI,CAAC,MAAM,OAAO,CAAC,IAAI,EAAE,CAAC,CAAC,MAAM,KAAK,CAAC,EAAE,CAAC;YACxC,MAAM,CAAC,IAAI,CACT,6CAA6C,QAAQ,mDAAmD,CACzG,CAAC;YACF,SAAS;QACX,CAAC;QAED,MAAM,UAAU,GAAG,MAAM,QAAQ,CAAC,QAAQ,EAAE,WAAW,CAAC,CAAC;QACzD,MAAM,WAAW,GAAa,CAAC,MAAM,WAAW,CAAC,QAAQ,CAAC,CAAC,CAAC;QAE5D,MAAM,CAAC,IAAI,CACT,yBAAyB,QAAQ,aAAa,UAAU,qBAAqB,WAAW,CAAC,IAAI,CAC3F,IAAI,CACL,EAAE,CACJ,CAAC;QAEF,MAAM,MAAM,GAAG,MAAM,YAAY,CAAC,YAAY,CAC5C,WAAW,CAAC,KAAK,EACjB,UAAU,EACV,WAAW,CACZ,CAAC;QAEF,IAAI,MAAM,KAAK,SAAS,EAAE,CAAC;YACzB,MAAM,CAAC,IAAI,CAAC,oBAAoB,MAAM,QAAQ,QAAQ,GAAG,CAAC,CAAC;YAC3D,cAAc,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC;QAChC,CAAC;aAAM,CAAC;YACN,MAAM,CAAC,IAAI,CAAC,+BAA+B,QAAQ,GAAG,CAAC,CAAC;QAC1D,CAAC;IACH,CAAC;IAED,OAAO,cAAc,CAAC;AACxB,CAAC;AAED;;;;;GAKG;AACI,KAAK,UAAU,sBAAsB,CAAC,MAAc,EAAE,MAAc;IACzE,KAAK,MAAM,QAAQ,IAAI,MAAM,CAAC,SAAS,EAAE,CAAC;QACxC,MAAM,WAAW,GAAG,2BAA2B,CAAC,QAAQ,CAAC,CAAC;QAE1D,IAAI,WAAW,KAAK,SAAS,EAAE,CAAC;YAC9B,MAAM,CAAC,IAAI,CACT,2CAA2C,QAAQ,8CAA8C,CAClG,CAAC;YACF,SAAS;QACX,CAAC;QAED,gGAAgG;QAChG,wBAAwB;QACxB,MAAM,OAAO,GAAG,MAAM,WAAW,CAAC,WAAW,CAAC,IAAI,CAAC,CAAC;QAEpD,IAAI,CAAC,MAAM,OAAO,CAAC,IAAI,EAAE,CAAC,CAAC,MAAM,KAAK,CAAC,EAAE,CAAC;YACxC,MAAM,CAAC,IAAI,CACT,2CAA2C,QAAQ,mDAAmD,CACvG,CAAC;YACF,SAAS;QACX,CAAC;QAED,yGAAyG;QACzG,uGAAuG;QACvG,uCAAuC;QACvC,uGAAuG;QACvG,uGAAuG;QACvG,sCAAsC;QACtC,uGAAuG;QACvG,sGAAsG;QACtG,sGAAsG;QACtG,4CAA4C;QAC5C,MAAM,IAAI,GAAG,MAAM,IAAA,iCAAiB,EAAC,WAAW,CAAC,KAAK,EAAE,MAAM,CAAC,CAAC;QAEhE,iCAAiC;QACjC,IAAI,IAAI,KAAK,CAAC,EAAE,CAAC;YACf,MAAM,CAAC,IAAI,CACT,2CAA2C,QAAQ,qBAAqB,CACzE,CAAC;YACF,SAAS;QACX,CAAC;QAED,MAAM,GAAG,GAAG,MAAM,QAAQ,CAAC,QAAQ,EAAE,WAAW,CAAC,CAAC;QAElD,MAAM,CAAC,IAAI,CACT,2BAA2B,IAAI,QAAQ,QAAQ,aAAa,GAAG,EAAE,CAClE,CAAC;QAEF,MAAM,YAAY,CAAC,SAAS,CAAC,WAAW,CAAC,KAAK,EAAE,GAAG,CAAC,CAAC;IACvD,CAAC;AACH,CAAC;AAED;;;;;;GAMG;AACH,KAAK,UAAU,QAAQ,CACrB,QAAkB,EAClB,WAAwB;IAExB,MAAM,IAAI,GAAG,MAAM,IAAI,CAAC,SAAS,CAAC,WAAW,CAAC,IAAI,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC;IAC/D,OAAO,GAAG,MAAM,WAAW,CAAC,QAAQ,CAAC,GAAG,IAAI,EAAE,CAAC;AACjD,CAAC;AAED;;;;;;GAMG;AACH,KAAK,UAAU,WAAW,CAAC,QAAkB;IAC3C,MAAM,QAAQ,GAAG,IAAA,0BAAmB,EAAC,WAAW,CAAC,CAAC;IAClD,MAAM,YAAY,GAAG,OAAO,CAAC,GAAG,CAAC,oBAAM,CAAC,yBAAyB,CAAC,CAAC;IACnE,IAAI,MAAM,GAAG,8BAA8B,CAAC;IAE5C,IAAI,YAAY,KAAK,SAAS,IAAI,YAAY,CAAC,MAAM,GAAG,CAAC,EAAE,CAAC;QAC1D,MAAM,GAAG,GAAG,MAAM,IAAI,YAAY,EAAE,CAAC;IACvC,CAAC;IAED,OAAO,GAAG,MAAM,IAAI,+BAA+B,IAAI,QAAQ,IAAI,QAAQ,GAAG,CAAC;AACjF,CAAC"}
\ No newline at end of file
+{"version":3,"file":"dependency-caching.js","sourceRoot":"","sources":["../src/dependency-caching.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;AA+EA,4DAmDC;AAQD,wDAiEC;AA3MD,uCAAyB;AACzB,+BAA4B;AAE5B,6DAA+C;AAC/C,oDAAsC;AAEtC,mDAAoD;AAEpD,+CAAuC;AAGvC,iCAA6C;AAgB7C,MAAM,8BAA8B,GAAG,qBAAqB,CAAC;AAC7D,MAAM,+BAA+B,GAAG,CAAC,CAAC;AAE1C;;GAEG;AACH,MAAM,2BAA2B,GAAwC;IACvE,IAAI,EAAE;QACJ,KAAK,EAAE;YACL,QAAQ;YACR,IAAA,WAAI,EAAC,EAAE,CAAC,OAAO,EAAE,EAAE,KAAK,EAAE,YAAY,CAAC;YACvC,SAAS;YACT,IAAA,WAAI,EAAC,EAAE,CAAC,OAAO,EAAE,EAAE,SAAS,EAAE,QAAQ,CAAC;SACxC;QACD,IAAI,EAAE;YACJ,QAAQ;YACR,YAAY;YACZ,SAAS;YACT,cAAc;YACd,8BAA8B;YAC9B,yBAAyB;YACzB,6BAA6B;YAC7B,wBAAwB;YACxB,wBAAwB;SACzB;KACF;IACD,MAAM,EAAE;QACN,KAAK,EAAE,CAAC,IAAA,WAAI,EAAC,EAAE,CAAC,OAAO,EAAE,EAAE,QAAQ,EAAE,UAAU,CAAC,CAAC;QACjD,IAAI,EAAE;YACJ,QAAQ;YACR,uBAAuB;YACvB,QAAQ;YACR,eAAe;SAChB;KACF;IACD,EAAE,EAAE;QACF,KAAK,EAAE,CAAC,IAAA,WAAI,EAAC,EAAE,CAAC,OAAO,EAAE,EAAE,IAAI,EAAE,KAAK,EAAE,KAAK,CAAC,CAAC;QAC/C,IAAI,EAAE,CAAC,WAAW,CAAC;KACpB;CACF,CAAC;AAEF,KAAK,UAAU,WAAW,CAAC,QAAkB;IAC3C,OAAO,IAAI,CAAC,MAAM,CAAC,QAAQ,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC;AAC1C,CAAC;AAED;;;;;;GAMG;AACI,KAAK,UAAU,wBAAwB,CAC5C,SAAqB,EACrB,MAAc;IAEd,MAAM,cAAc,GAAe,EAAE,CAAC;IAEtC,KAAK,MAAM,QAAQ,IAAI,SAAS,EAAE,CAAC;QACjC,MAAM,WAAW,GAAG,2BAA2B,CAAC,QAAQ,CAAC,CAAC;QAE1D,IAAI,WAAW,KAAK,SAAS,EAAE,CAAC;YAC9B,MAAM,CAAC,IAAI,CACT,6CAA6C,QAAQ,8CAA8C,CACpG,CAAC;YACF,SAAS;QACX,CAAC;QAED,gGAAgG;QAChG,wBAAwB;QACxB,MAAM,OAAO,GAAG,MAAM,WAAW,CAAC,WAAW,CAAC,IAAI,CAAC,CAAC;QAEpD,IAAI,CAAC,MAAM,OAAO,CAAC,IAAI,EAAE,CAAC,CAAC,MAAM,KAAK,CAAC,EAAE,CAAC;YACxC,MAAM,CAAC,IAAI,CACT,6CAA6C,QAAQ,mDAAmD,CACzG,CAAC;YACF,SAAS;QACX,CAAC;QAED,MAAM,UAAU,GAAG,MAAM,QAAQ,CAAC,QAAQ,EAAE,WAAW,CAAC,CAAC;QACzD,MAAM,WAAW,GAAa,CAAC,MAAM,WAAW,CAAC,QAAQ,CAAC,CAAC,CAAC;QAE5D,MAAM,CAAC,IAAI,CACT,yBAAyB,QAAQ,aAAa,UAAU,qBAAqB,WAAW,CAAC,IAAI,CAC3F,IAAI,CACL,EAAE,CACJ,CAAC;QAEF,MAAM,MAAM,GAAG,MAAM,YAAY,CAAC,YAAY,CAC5C,WAAW,CAAC,KAAK,EACjB,UAAU,EACV,WAAW,CACZ,CAAC;QAEF,IAAI,MAAM,KAAK,SAAS,EAAE,CAAC;YACzB,MAAM,CAAC,IAAI,CAAC,oBAAoB,MAAM,QAAQ,QAAQ,GAAG,CAAC,CAAC;YAC3D,cAAc,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC;QAChC,CAAC;aAAM,CAAC;YACN,MAAM,CAAC,IAAI,CAAC,+BAA+B,QAAQ,GAAG,CAAC,CAAC;QAC1D,CAAC;IACH,CAAC;IAED,OAAO,cAAc,CAAC;AACxB,CAAC;AAED;;;;;GAKG;AACI,KAAK,UAAU,sBAAsB,CAAC,MAAc,EAAE,MAAc;IACzE,KAAK,MAAM,QAAQ,IAAI,MAAM,CAAC,SAAS,EAAE,CAAC;QACxC,MAAM,WAAW,GAAG,2BAA2B,CAAC,QAAQ,CAAC,CAAC;QAE1D,IAAI,WAAW,KAAK,SAAS,EAAE,CAAC;YAC9B,MAAM,CAAC,IAAI,CACT,2CAA2C,QAAQ,8CAA8C,CAClG,CAAC;YACF,SAAS;QACX,CAAC;QAED,gGAAgG;QAChG,wBAAwB;QACxB,MAAM,OAAO,GAAG,MAAM,WAAW,CAAC,WAAW,CAAC,IAAI,CAAC,CAAC;QAEpD,IAAI,CAAC,MAAM,OAAO,CAAC,IAAI,EAAE,CAAC,CAAC,MAAM,KAAK,CAAC,EAAE,CAAC;YACxC,MAAM,CAAC,IAAI,CACT,2CAA2C,QAAQ,mDAAmD,CACvG,CAAC;YACF,SAAS;QACX,CAAC;QAED,yGAAyG;QACzG,uGAAuG;QACvG,uCAAuC;QACvC,uGAAuG;QACvG,uGAAuG;QACvG,sCAAsC;QACtC,uGAAuG;QACvG,sGAAsG;QACtG,sGAAsG;QACtG,4CAA4C;QAC5C,MAAM,IAAI,GAAG,MAAM,IAAA,iCAAiB,EAAC,WAAW,CAAC,KAAK,EAAE,MAAM,CAAC,CAAC;QAEhE,iCAAiC;QACjC,IAAI,IAAI,KAAK,CAAC,EAAE,CAAC;YACf,MAAM,CAAC,IAAI,CACT,2CAA2C,QAAQ,qBAAqB,CACzE,CAAC;YACF,SAAS;QACX,CAAC;QAED,MAAM,GAAG,GAAG,MAAM,QAAQ,CAAC,QAAQ,EAAE,WAAW,CAAC,CAAC;QAElD,MAAM,CAAC,IAAI,CACT,2BAA2B,IAAI,QAAQ,QAAQ,aAAa,GAAG,KAAK,CACrE,CAAC;QAEF,IAAI,CAAC;YACH,MAAM,YAAY,CAAC,SAAS,CAAC,WAAW,CAAC,KAAK,EAAE,GAAG,CAAC,CAAC;QACvD,CAAC;QAAC,OAAO,KAAK,EAAE,CAAC;YACf,yFAAyF;YACzF,uFAAuF;YACvF,gCAAgC;YAChC,IAAI,KAAK,YAAY,YAAY,CAAC,iBAAiB,EAAE,CAAC;gBACpD,MAAM,CAAC,IAAI,CACT,2BAA2B,QAAQ,aAAa,GAAG,qBAAqB,CACzE,CAAC;gBACF,MAAM,CAAC,KAAK,CAAC,KAAK,CAAC,OAAO,CAAC,CAAC;YAC9B,CAAC;iBAAM,CAAC;gBACN,kCAAkC;gBAClC,MAAM,KAAK,CAAC;YACd,CAAC;QACH,CAAC;IACH,CAAC;AACH,CAAC;AAED;;;;;;GAMG;AACH,KAAK,UAAU,QAAQ,CACrB,QAAkB,EAClB,WAAwB;IAExB,MAAM,IAAI,GAAG,MAAM,IAAI,CAAC,SAAS,CAAC,WAAW,CAAC,IAAI,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC;IAC/D,OAAO,GAAG,MAAM,WAAW,CAAC,QAAQ,CAAC,GAAG,IAAI,EAAE,CAAC;AACjD,CAAC;AAED;;;;;;GAMG;AACH,KAAK,UAAU,WAAW,CAAC,QAAkB;IAC3C,MAAM,QAAQ,GAAG,IAAA,0BAAmB,EAAC,WAAW,CAAC,CAAC;IAClD,MAAM,YAAY,GAAG,OAAO,CAAC,GAAG,CAAC,oBAAM,CAAC,yBAAyB,CAAC,CAAC;IACnE,IAAI,MAAM,GAAG,8BAA8B,CAAC;IAE5C,IAAI,YAAY,KAAK,SAAS,IAAI,YAAY,CAAC,MAAM,GAAG,CAAC,EAAE,CAAC;QAC1D,MAAM,GAAG,GAAG,MAAM,IAAI,YAAY,EAAE,CAAC;IACvC,CAAC;IAED,OAAO,GAAG,MAAM,IAAI,+BAA+B,IAAI,QAAQ,IAAI,QAAQ,GAAG,CAAC;AACjF,CAAC"}
\ No newline at end of file
diff --git a/src/dependency-caching.ts b/src/dependency-caching.ts
index 5b86049c54..02947832b4 100644
--- a/src/dependency-caching.ts
+++ b/src/dependency-caching.ts
@@ -181,10 +181,25 @@ export async function uploadDependencyCaches(config: Config, logger: Logger) {
     const key = await cacheKey(language, cacheConfig);
 
     logger.info(
-      `Uploading cache of size ${size} for ${language} with key ${key}`,
+      `Uploading cache of size ${size} for ${language} with key ${key}...`,
     );
 
-    await actionsCache.saveCache(cacheConfig.paths, key);
+    try {
+      await actionsCache.saveCache(cacheConfig.paths, key);
+    } catch (error) {
+      // `ReserveCacheError` indicates that the cache key is already in use, which means that a
+      // cache with that key already exists or is in the process of being uploaded by another
+      // workflow. We can ignore this.
+      if (error instanceof actionsCache.ReserveCacheError) {
+        logger.info(
+          `Not uploading cache for ${language}, because ${key} is already in use.`,
+        );
+        logger.debug(error.message);
+      } else {
+        // Propagate other errors upwards.
+        throw error;
+      }
+    }
   }
 }