GraphQL Error

Error: Cannot use GraphQLObjectType "RoleConnection" from another module or realm.

Ensure that there is only one instance of "graphql" in the node_modules
directory. If different versions of "graphql" are the dependencies of other
relied on modules, use "resolutions" to ensure only one version is installed.

https://yarnpkg.com/en/docs/selective-version-resolutions

Duplicate "graphql" modules cannot be used at the same time since different
versions may have different capabilities and behavior. The data from one
version used in the function from another could produce confusing and
spurious results.
at instanceOf (/app/node_modules/parse-server/node_modules/graphql/jsutils/instanceOf.js:35:13)
at isObjectType (/app/node_modules/parse-server/node_modules/graphql/type/definition.js:122:34)
at isType (/app/node_modules/parse-server/node_modules/graphql/type/definition.js:92:32)
at isNullableType (/app/node_modules/parse-server/node_modules/graphql/type/definition.js:422:10)
at assertNullableType (/app/node_modules/parse-server/node_modules/graphql/type/definition.js:426:8)
at new GraphQLNonNull (/app/node_modules/parse-server/node_modules/graphql/type/definition.js:379:19)
at Object.load (/app/node_modules/parse-server/lib/GraphQL/loaders/parseClassQueries.js:109:13)
at /app/node_modules/parse-server/lib/GraphQL/ParseGraphQLSchema.js:109:25
at Array.forEach ()
at ParseGraphQLSchema.load (/app/node_modules/parse-server/lib/GraphQL/ParseGraphQLSchema.js:107:71)

Start by reproducing the schema-loading failure involving RoleConnection, then inspect lib/GraphQL/loaders/parseClassQueries.js around line 109 and lib/GraphQL/ParseGraphQLSchema.js around lines 107-109. Compare the graphql modules involved and verify that schema loading completes without the duplicate-module or cross-realm error.