diff --git a/openpype/lib/avalon_context.py b/openpype/lib/avalon_context.py
index 85beecab51..a8340d7d09 100644
--- a/openpype/lib/avalon_context.py
+++ b/openpype/lib/avalon_context.py
@@ -273,7 +273,15 @@ def get_linked_asset_ids(asset_doc):
 
     input_links = asset_doc["data"].get("inputLinks") or []
     if input_links:
-        output = [item["_id"] for item in input_links]
+        for item in input_links:
+            # Backwards compatibility for "_id" key which was replaced with
+            #   "id"
+            if "_id" in item:
+                link_id = item["_id"]
+            else:
+                link_id = item["id"]
+            output.append(link_id)
+
     return output
 
 
diff --git a/openpype/modules/default_modules/ftrack/event_handlers_server/event_sync_links.py b/openpype/modules/default_modules/ftrack/event_handlers_server/event_sync_links.py
index 8c3d858a96..83132acd85 100644
--- a/openpype/modules/default_modules/ftrack/event_handlers_server/event_sync_links.py
+++ b/openpype/modules/default_modules/ftrack/event_handlers_server/event_sync_links.py
@@ -113,7 +113,7 @@ class SyncLinksToAvalon(BaseEvent):
                     continue
 
                 links.append({
-                    "_id": ObjectId(link_mongo_id),
+                    "id": ObjectId(link_mongo_id),
                     "linkedBy": "ftrack",
                     "type": "breakdown"
                 })
diff --git a/openpype/modules/default_modules/ftrack/lib/avalon_sync.py b/openpype/modules/default_modules/ftrack/lib/avalon_sync.py
index 9e22f80b1c..3ba874281a 100644
--- a/openpype/modules/default_modules/ftrack/lib/avalon_sync.py
+++ b/openpype/modules/default_modules/ftrack/lib/avalon_sync.py
@@ -1479,7 +1479,7 @@ class SyncEntitiesFactory:
                 mongo_id = self.ftrack_avalon_mapper.get(ftrack_link_id)
                 if mongo_id is not None:
                     input_links.append({
-                        "_id": ObjectId(mongo_id),
+                        "id": ObjectId(mongo_id),
                         "linkedBy": "ftrack",
                         "type": "breakdown"
                     })
diff --git a/openpype/plugins/publish/integrate_inputlinks.py b/openpype/plugins/publish/integrate_inputlinks.py
index e8a8b2296c..f973dfc963 100644
--- a/openpype/plugins/publish/integrate_inputlinks.py
+++ b/openpype/plugins/publish/integrate_inputlinks.py
@@ -81,7 +81,8 @@ class IntegrateInputLinks(pyblish.api.ContextPlugin):
                     version_doc=instance.data["versionEntity"],
                 )
 
-        publishing.append(workfile)
+        if workfile is not None:
+            publishing.append(workfile)
         self.write_links_to_database(publishing)
 
     def add_link(self, link_type, input_id, version_doc):
@@ -103,7 +104,7 @@ class IntegrateInputLinks(pyblish.api.ContextPlugin):
         # future.
         link = OrderedDict()
         link["type"] = link_type
-        link["input"] = io.ObjectId(input_id)
+        link["id"] = io.ObjectId(input_id)
         link["linkedBy"] = "publish"
 
         if "inputLinks" not in version_doc["data"]:
diff --git a/openpype/tools/assetlinks/widgets.py b/openpype/tools/assetlinks/widgets.py
index 9a136462b0..22e8848a60 100644
--- a/openpype/tools/assetlinks/widgets.py
+++ b/openpype/tools/assetlinks/widgets.py
@@ -37,8 +37,13 @@ class SimpleLinkView(QtWidgets.QWidget):
         # inputs
         #
         for link in version_doc["data"].get("inputLinks", []):
+            # Backwards compatibility for "input" key used as "id"
+            if "id" not in link:
+                link_id = link["input"]
+            else:
+                link_id = link["id"]
             version = self.dbcon.find_one(
-                {"_id": link["input"], "type": "version"},
+                {"_id": link_id, "type": "version"},
                 projection={"name": 1, "parent": 1}
             )
             if not version: