diff --git a/Sources/Classes/RSContext.m b/Sources/Classes/RSContext.m
index 0f7558d9..bde63de2 100644
--- a/Sources/Classes/RSContext.m
+++ b/Sources/Classes/RSContext.m
@@ -184,31 +184,34 @@ - (void)putAdvertisementId:(NSString *_Nonnull)idfa {
     });
 }
 
-- (void)updateExternalIds:(NSMutableArray *)externalIds {
+- (void)updateExternalIds:(NSMutableArray *)newExternalIds {
     dispatch_sync(queue, ^{
-        if(self->_externalIds == nil)
-        {
+        if(self->_externalIds == nil){
             self->_externalIds = [[NSMutableArray alloc] init];
         }
         
-        NSMutableArray *newExternalIds = [externalIds mutableCopy];
-        if (self->_externalIds.count > 0) {
-            NSMutableArray *repeatingExternalIds = [[NSMutableArray alloc] init];
-            for (NSMutableDictionary *newExternalId in newExternalIds) {
-                for (NSMutableDictionary *externalId in self->_externalIds) {
-                    if ([externalId[@"type"] isEqualToString:newExternalId[@"type"]]){
-                        externalId[@"id"] = newExternalId[@"id"];
-                        [repeatingExternalIds addObject:newExternalId];
-                        break;
-                    }
-                }
-            }
-            [newExternalIds removeObjectsInArray:repeatingExternalIds];
+        NSMutableDictionary<NSString *, NSMutableDictionary<NSString *, NSObject *> *> *mergedValues = [NSMutableDictionary dictionary];
+        
+        for (NSMutableDictionary<NSString *, NSObject *> *externalId in self.externalIds) {
+            NSString *type = [NSString stringWithFormat:@"%@", externalId[@"type"]];
+            mergedValues[type] = [externalId mutableCopy];
         }
         
-        if ([newExternalIds count]) {
-            [self->_externalIds addObjectsFromArray: newExternalIds];
+        // Merge new externalIds into the existing merged values
+        for (NSMutableDictionary<NSString *, NSObject *> *newExternalId in newExternalIds) {
+            NSString *type = [NSString stringWithFormat:@"%@", newExternalId[@"type"]];
+            NSMutableDictionary<NSString *, NSObject *> *existingMergedValue = mergedValues[type];
+            
+            if (existingMergedValue) {
+                // Merge values for the same "type"
+                [existingMergedValue addEntriesFromDictionary:newExternalId];
+            } else {
+                // No existing merged value for this "type," add a copy of the newExternalId
+                mergedValues[type] = [newExternalId mutableCopy];
+            }
         }
+        
+        self.externalIds = [[mergedValues allValues] mutableCopy];
     });
 }