Cocos Creator 3.3.1 Duplicate keys detected: This may cause an update error

Cocos Creator
#1

Hi all. In current version of Cocos I usually see such error when create a lot of nodes from prefabs. After this my nodes stuck in editor and require editor restart, but then comes again:

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Video:

#2

I can ask engineering to review this.

#3

I noticed it happens when I create a node in editor by @executeInEditMode decorator…
I gave up and just created nodes inside prefab manually… and change its active in @excuteInEditMode:

These two nodes previously were created depend on cellType property.
image

enum CellType {
	Ground,
	High,
	None,
}

@ccclass('CellTypeNodes')
class CellTypeNodes {
	@property(Node)
	Ground: Node = null;

	@property(Node)
	High: Node = null;
}

@ccclass('CellBasicComponent')
@executeInEditMode()
export class CellBasicComponent extends Component {
	@property(CellTypeNodes)
	private cellNodes: CellTypeNodes = new CellTypeNodes();

	@property
	private _cellType: CellType = CellType.None;

	private _lastActiveNode: Node = null;

	@property({ type: Enum(CellType) })
	get cellType() {
		return this._cellType;
	}

	set cellType(value: CellType) {
		this._cellType = value;

		this.updateCell();
	}

	protected onLoad() {
		const { cellNodes, cellType } = this;

		if (!EDITOR) {
			for (const key in cellNodes) {
				if (key !== CellType[cellType]) {
					cellNodes[key].removeFromParent();
					cellNodes[key].destroy();
				}
			}

			cellNodes[CellType[cellType]].active = true;
		} else {
			this.updateCell();
		}
	}

	private updateCell() {
		const { node, cellType, cellNodes } = this;

		this._lastActiveNode && (this._lastActiveNode.active = false);

		if (cellType === CellType.None) {
			return;
		}

		cellNodes[CellType[cellType]].active = true;

		this._lastActiveNode = cellNodes[CellType[cellType]];
	}
}

My code like this now…

Also, this error happens when I copy and paste prefab in the scene… I switched version to the 3.3.2, but still bug with copy&paste and when I create nodes in @executeInEditMode

#4

I confirmed the issue and I was able to reproduce the issue you mentioned on 3.3.2. We have solved this issue in 3.4.0, I tested with 3.4.0 which is not yet released internally and this issue does not exist.

#5

This should be related to the data copy, the data inside the scene file is confused. It may not have anything to do with the use of @executeInEditMode. I’m using just nodes and components to test.

#6

I think the problem in prefabs… You can look my another topic, I explained a lot of issues: