def practice2 = put("/rest/api/2/issue/${issueKey}").header('Content-Type', 'application/json').body([fields: [customfield_10104:[{value:val1},{value:val2 }] ,]]).asString()}
@Sneha A Shave you tried this with API v3. Mentioned here - https://developer.atlassian.com/cloud/jira/platform/rest/v3/#api-rest-api-3-issue-issueIdOrKey-put
ya.....i tried but still it is not working
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