Replace a flag's variants

{  "data": [    {      "id": "ff_var_b3n5q0w2e7h7d2k9m4x1c6v8",      "key": "ff_var_b3n5q0w2e7h7d2k9m4x1c6v8",      "label": "Plain",      "value": "Go Pro",      "weightPercentage": 50    },    {      "id": "ff_var_m4x1c6v8b3n5q0w2e7h7d2k9",      "key": "ff_var_m4x1c6v8b3n5q0w2e7h7d2k9",      "label": "Price",      "value": "Pro for $4.99 a month",      "weightPercentage": 50    }  ],  "pageInfo": {    "endCursor": null,    "hasNextPage": false  }}

{  "error": {    "type": "invalid_request",    "code": "invalid_variants",    "message": "Boolean feature flags cannot have variants",    "param": "variants"  }}

{  "error": {    "type": "unauthenticated",    "code": "invalid_api_key",    "message": "This secret key is not valid."  }}

{  "error": {    "type": "permission_denied",    "code": "permission_denied",    "message": "Insufficient permissions."  }}

{  "error": {    "type": "not_found",    "code": "project_not_found",    "message": "There is no project proj_tz4a98xxat96iws9zmbrgj3a, or this credential cannot use it.",    "param": "projectId"  }}

{  "error": {    "type": "conflict",    "code": "feature_flag_managed_by_experiment",    "message": "Feature flag ff_k9m4x1c6v8b3n5q0w2e7h7d2 assigns the arms of experiment exp_c6v8b3n5q0w2e7h7d2k9m4x1; change it through the experiment."  }}

{  "error": {    "type": "internal",    "code": "internal_error",    "message": "Something went wrong on our side. Try again, and contact support with the Request-Id header if it keeps failing."  }}