There are five blocks on the canvas; after exporting to JSON, only nodes and connections remain. This article breaks down four terms: why the node name is the primary key, which layer of the connections array is the output index, why old node names still appear in execution records, and at the end includes five actual error messages verbatim.

Build the first n8n workflow from a blank canvas: manually trigger creation of one data item, use Edit Fields to add the four quote fields, and use a Code node to calculate the total price including shipping. Includes workflow JSON you can paste and import directly, plus the type pitfall that turns 430 into 37060.