getting error while providing subnet ocid

[ramachandranramar]

var.subnet_ocids
The unique identifiers (OCIDs) of the subnets in which the instance primary VNICs are created.

Enter a value: ocid1.subnet.oc1.iad.aaaaaaaap5ftcrfof2zs47275r6zrfwsrfd5ekjqaea6x6bd4jfmplwe74xa

╷
│ Error: Variables not allowed
│
│ on line 1:
│ (source code not available)
│
│ Variables may not be used here.
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╷
│ Error: No value for required variable
│
│ on variables.tf line 217:
│ 217: variable "subnet_ocids" {
│
│ The root module input variable "subnet_ocids" is not set, and has no default value. Use a -var or -var-file command line
│ argument to provide a value for this variable.
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[opc@oci-cli-instance terraform-oci-compute-instance]$