stride3d/stride · error · ArgumentException

Assets must have the same Id.

Error message

Assets must have the same Id.

What it means

AssetViewModel.UpdateAsset replaces the internal asset with a new one and requires the replacement to be the same identity — i.e. share the same Id — because it is an in-place update of an existing asset item, not a replacement with a different asset. A mismatched Id is a caller error, raised as ArgumentException.

Solutions

1. Ensure the new asset was loaded from the same asset item so its Id matches; do not pass clones or duplicates.
2. If Ids legitimately differ, remove/re-add the asset instead of calling UpdateAsset.
3. Re-import or re-save the source file so it keeps the original asset Id.

Example fix

// before
if (loadedAsset.Id != currentAsset.Id) { /* silently update */ }
vm.UpdateAsset(loadedAsset, logger);
// after
if (loadedAsset.Id != vm.AssetItem.Asset.Id)
    throw new InvalidOperationException("Reloaded asset is a copy, not the same asset.");
vm.UpdateAsset(loadedAsset, logger);

if (newAsset.Id != vm.AssetItem.Asset.Id) { logger.Error("Cannot update: asset Ids differ (copy vs original)"); return; }

bool IsSameAssetIdentity(AssetViewModel vm, Asset a) => a.Id == vm.AssetItem.Asset.Id;

try { vm.UpdateAsset(newAsset, logger); }
catch (ArgumentException ex) { logger.Error(ex, "Reloaded asset has a different Id; it is not an update of this asset"); }

When it happens

Trigger: Calling UpdateAsset(newAsset, logger) with an Asset whose Id differs from AssetItem.Asset.Id, e.g. deserializing a copy/duplicate of the asset instead of the updated version of the same asset.

Common situations: Reload/reimport workflows where the file was duplicated (getting a new Guid) instead of saved in place; loading an older file version with a different Id; mixing assets between packages.

Understand the failure class

Background: "Must be a positive integer", "Invalid value", "Unsupported": the invalid-argument-value error family, when a library rejects the value you pass — this error's family across 35 libraries.

Related errors

• url cannot be null or empty.
• The given directory is not contained in the given package.
• Assets must have the same source.
• The given id cannot be found in the root parts of this…
• Unable to find the base

AI-assisted analysis of stride3d/stride@96fad776d2 (2026-09-14). Data as JSON: /api/errors/b688f62a8a49b216. Report an issue: GitHub.

Appendix: source

Thrown at sources/editor/Stride.Core.Assets.Editor/ViewModel/AssetViewModel.cs:519

            if (newName == name)
                return;

            using (var transaction = UndoRedoService.CreateTransaction())
            {
                string previousName = name;
                UpdateUrl(package, directory, newName);
                UndoRedoService.SetName(transaction, $"Rename asset '{previousName}' to '{newName}'");
            }
        }

        /// <summary>
        /// Replace the internal asset with the one provided, this function expects the two assets to have the same identity 
        /// </summary>
        /// <exception cref="ArgumentException">The asset provided does not have the same identity as the current one</exception>
        public void UpdateAsset(Asset newAsset, ILogger loggerResult)
        {
            if (newAsset.Id != AssetItem.Asset.Id)
                throw new ArgumentException("Assets must have the same Id.");

            if (newAsset.MainSource != AssetItem.Asset.MainSource)
                throw new ArgumentException("Assets must have the same source.");

            var newAssetItem = AssetItem.Clone(newAsset: newAsset);

            package.Assets.Remove(AssetItem);
            package.Assets.Add(newAssetItem);

            AssetItem = newAssetItem;

            PropertyGraph?.Dispose();
            Session.GraphContainer.UnregisterGraph(assetItem.Id);

            PropertyGraph = Session.GraphContainer.InitializeAsset(assetItem, loggerResult);
            if (PropertyGraph != null)
            {
                PropertyGraph.BaseContentChanged += BaseContentChanged;

View on GitHub (pinned to 96fad776d2)