Why it shows error While updating an array using jq

My JSON file (temp.json):

{
	"first": {
		"second": [
			{
				"third": [
					"1000",
					"1001"
				],
				"fourth": "Don'tWantToChange"
			},
			{
				"third": [
					"1000",
					"1001",
					"1002"
				],
				"fourth": "WantToChange"
			}
		]
	}
}

I want to select an item from array and update as below

{
	"first": {
		"second": [
			{
				"third": [
					"1000",
					"1001"
				],
				"fourth": "Don'tWantToChange"
			},
			{
				"third": [
					"1000",
					"1001",
					"1002"
				],
				"fourth": "changed"
			}
		]
	}
}

This is my code:

jq '(.first | .second[] | select(.third | index("1002")) | .fourth) |= "changed"' temp.json

It works on Online JQ Playgrounds perfectly

But in the terminal, it shows Error:

jq: error (at temp.json:13): Invalid path expression near attempt to access element "fourth" of {"third":["1000","1001","1...

Where am I going wrong?

jq-1.5-1-a5b5cbe (as packaged with certain releases of Debain and Ubuntu) had issues with inferring types from a pipelined select filter. In this case, index provides null if the value was not found, or a number (the actual index) if it was, but select requires a boolean result in its body.

Workaround: Wrap the body in parens, and compare its result against null to get a boolean:

(.first | .second[] | select((.third | index("1002")) != null) | .fourth) = "changed"

Solution: Upgrade to jq 1.6. It was released in 2018.

Note: With the given sample, neither version requires the update operator |=. Just use = to assign a static value.