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What the error means
Docker can accept an abbreviated ID when that prefix identifies a single object. The truncindex package documents prefix lookup and returns “Multiple IDs found with provided prefix” when more than one indexed ID matches. Docker truncindex source
The error does not by itself tell you which object you meant, and it is not a reason to delete anything. Identify the target from Docker’s current listing instead of relying on an ID shown in an error message.
Find the matching object type
Use the listing that corresponds to the ID you supplied. By default, docker ps shows running containers only; add -a to include containers in other states, and --no-trunc to show full IDs. Docker container listing reference
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For a container
docker ps -a --no-truncLocate the intended container by its full ID or name. This is useful when a command such as docker attach, docker rm, docker stop, or docker logs rejects an abbreviated container ID.
For an image
docker images --no-truncUse the image listing if the ambiguous value is an image ID; container listings cannot establish which image you intended. Docker documents --no-trunc for displaying complete image IDs. Docker image listing reference
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Retry with an exact identifier
Replace the short prefix in your original command with the full ID you found, or use the container’s name if you recognize it. For example:
docker attach <full-container-id>
# or
docker attach <container-name>Use the equivalent full image ID when running an image command. Docker also supports naming containers and referring to them by name. Docker container inspect reference
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When using docker inspect
docker inspect accepts object IDs or names. If the object type might be unclear, constrain the lookup with --type:
docker inspect --type=container <full-container-id>
docker inspect --type=image <full-image-id>The inspect reference describes --type as a way to resolve ambiguity when objects of different types share a name. Docker inspect reference
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Why a short prefix may fail
Any prefix that is not unique in the applicable ID index can be ambiguous. A 2017 community-thread example reported a three-character prefix failing with docker attach; it is a historical anecdote, not a rule about how many characters are safe in every Docker environment. Docker community thread
A Moby issue also reproduced an ambiguity with a two-character prefix in a report that listed Engine 18.09.0 and API 1.39. That documents a historical reproduction, not a version boundary or a claim that all current environments behave identically. Moby issue
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Use a full ID or name rather than relying on a minimum prefix length. If your installed Docker version behaves differently from the current CLI references, check the documentation matching that version.
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