After upgrading prefect core and server to `0 15 7` from `0

Question

After upgrading prefect core and server to `0 15 7` from `0 14 22` we are seeing this error on registration of flow to the server Any idea why this is happening Has API contract changed Also tagging < David Harrington> for visibility Traceback in thread

Payam Vaezi · Answer

Traceback ```prefect exceptions ClientError 400 Client Error Bad Request for url <http prefect server apollo 4200 graphql> The following error messages were provided by the GraphQL server GRAPHQL VALIDATION FAILED Unknown type register tasks input Did you mean register agent input delete agent input delete flow input delete tenant input or log insert input GRAPHQL VALIDATION FAILED Cannot query field register tasks on type Mutation Did you mean register agent delete task insert task or update task The GraphQL query was mutation $input register tasks input register tasks input $input success The passed variables were input flow id 62bdd54f 16c2 47d6 ba36 7d69646b956f serialized tasks tags cache for null auto generated false trigger fn prefect triggers all successful kwargs skip on upstream skip true name canary slug canary 1 timeout null outputs typing Any inputs kwargs required true type typing Any max retries 0 retry delay null cache key null cache validator fn prefect engine cache validators never use kwargs type mlaasflow core engines prefect PrefectTransformer version 0 15 7 tags cache for null auto generated false trigger fn prefect triggers all successful kwargs skip on upstream skip true name collect slug collect 1 timeout null outputs typing Any inputs kwargs required true type typing Any max retries 0 retry delay null cache key null cache validator fn prefect engine cache validators never use kwargs type mlaasflow core engines prefect PrefectTransformer version 0 15 7 tags cache for null auto generated false trigger fn prefect triggers all successful kwargs skip on upstream skip true name fork slug fork 1 timeout null outputs typing Any inputs kwargs required true type typing Any max retries 0 retry delay null cache key null cache validator fn prefect engine cache validators never use kwargs type mlaasflow core engines prefect PrefectTransformer version 0 15 7 tags cache for null auto generated false trigger fn prefect triggers all successful kwargs skip on upstream skip true name preprocess slug preprocess 1 timeout null outputs typing Any inputs kwargs required true type typing Any max retries 0 retry delay null cache key null cache validator fn prefect engine cache validators never use kwargs type mlaasflow core engines prefect PrefectTransformer version 0 15 7 tags cache for null auto generated false trigger fn prefect triggers all successful kwargs skip on upstream skip true name sink slug sink 1 timeout null outputs typing Any inputs kwargs required true type typing Any max retries 0 retry delay null cache key null cache validator fn prefect engine cache validators never use kwargs type mlaasflow core engines prefect PrefectTransformer version 0 15 7 tags cache for null auto generated false trigger fn prefect triggers all successful kwargs skip on upstream skip true name source slug source 1 timeout null outputs typing Any inputs kwargs required true type typing Any max retries 0 retry delay null cache key null cache validator fn prefect engine cache validators never use kwargs type mlaasflow core engines prefect PrefectTransformer version 0 15 7 ``` I confirmed prefect server version is ```k exec it prefect server graphql 667cc66d6f t8gzp bin bash I have no name prefect server graphql 667cc66d6f t8gzp prefect server$ python Python 3 7 11 default Aug 17 2021 03 29 57 GCC 8 3 0 on linux Type help copyright credits or license for more information gt gt gt import prefect gt gt gt prefect version 0 15 4+23 gda07d2551 ``` a bit different on the patch version don t know if that matters

Kevin Kho · Answer

Hey < Payam Vaezi> can we move the traceback to the thread to keep the channel a bit more compact Just confirming Server is on 0 15 4 and you registered from 0 15 7

Payam Vaezi · Answer

Just moved it And yes versions are what you stated

Kevin Kho · Answer

I think Server version needs to be greater than Registration version because the registration can hit API routes that don t exist if the server version is lower

Kevin Kho · Answer

And thanks for moving it

Zanie · Answer

It seems likely you are encountering this breaking change for flow registration <https github com PrefectHQ prefect blob master CHANGELOG md breaking changes>

Payam Vaezi · Answer

Thanks for pointing out to the changelogs we updated the prefect server to 2021 11 09 and it solved our breaking change problem