Solution 1: If the declared constant uses ref, check whether the assignment and the assigned value correspond to each other.
As shown in the picture above, I assign a value to an object, and if I write this directly, the error in the first picture above will be reported.
Correction: change ref() to ref({})
Solution 2: If you use reactive
Then use Object.assign(a, b), the first a is assigned, and the second has data
Learn about Object.assign() at Object.assign() - JavaScript | MDN (mozilla.org)