Github key already exists

Describes the cause and action for error messages.

Error Message(English)：
key already exists

Resolution

what happens if substituted key already exists? ・ Issue #8 ... - GitHub
https://github.com/Muryoutaisuu/secretsfs/issues/8

Key already exists when trying to use draft 7 ・ Issue #875 ... - GitHub
https://github.com/epoberezkin/ajv/issues/875

Avoid ArgumentException (Key already exists) in parallelized ... - GitHub
https://github.com/aaubry/YamlDotNet/pull/345/files

App should return 409 when private key already exists ・ Issue ... - GitHub
https://github.com/nextcloud/end_to_end_encryption/issues/57

Error: URL key already exists. 1 ・ Issue #5 ・ venustheme/brand ・ GitHub
https://github.com/venustheme/brand/issues/5

bolthold/put.go at master ・ timshannon/bolthold ・ GitHub
https://github.com/timshannon/bolthold/blob/master/put.go

ETCD key already exists ・ Issue #1622 ・ coreos/fleet ・ GitHub
https://github.com/coreos/fleet/issues/1622

fix issue with "An entry with the same key already exists." in ... - GitHub
https://github.com/datastax/csharp-driver/pull/404

ArgumentException: An element with the key '(key)' already exists in ...
https://github.com/aspnet/Routing/issues/394