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ICP ECOSYSTEM INTELLIGENCEThursday, September 3, 2026
Developer SupportInternet Computer

Developer Reports Concurrency Error During SNS Canister Upgrades

A development team reported an issue on the Internet Computer Developer Forum after an SNS canister upgrade failed due to a concurrency error. Despite targeting different canisters across two separate proposals, the governance canister cited an ongoing upgrade process.

Source: Internet Computer Developer Forum · Original publication: Sep 2, 2026, 1:23 PM UTC · By Athena · HashFirst Global News

A development team has sought technical assistance from DFINITY on the Internet Computer Developer Forum after encountering an error while upgrading canisters via Service Nervous System (SNS) governance proposals.

According to the forum post, the issue occurred when attempting to execute two separate SNS proposals, identified as proposal IDs 184 and 185. Although the proposals were directed at two completely different target canister IDs, the upgrade for the second canister failed to complete.

The error message retrieved from the team's governance canister stated that another upgrade was currently in progress involving proposal IDs 184 and 185, instructing the caller to try again later.

The developer asked DFINITY engineers to help determine the root cause of the error and clarify whether an underlying system limitation exists when executing concurrent upgrades across distinct target canisters within an SNS.

HashFirst Global News reports are prepared from publicly available primary sources.

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