eth_subscribe return error capacity has been reached

[envestcc]

What version of iotex-core image (or code branch) are you using?

v2.0.0

What operating system and processor architecture are you using?

macOS m1

What did you do? If possible, provide a recipe for reproducing the error.

{
    "method": "eth_subscribe",
    "params": [
        "logs",
        {
            "address": "0xFebD6898D37Ade70B085331964080c32532ca22A",
            "topics": [
                "0x87abfd78e844f28318363bdf3da99eab2f4a2da9ff7ae365484507f7b6c3f805"
            ]
        }
    ],
    "id": 14,
    "jsonrpc": "2.0"
}

What did you expect to see?

{
    "jsonrpc": "2.0",
    "id": 14,
    "result": "0x6fac234b826ba0676d71ea55848c7019"
}

What did you see instead?

{"jsonrpc":"2.0","id":14,"error":{"code":-32603,"message":"capacity has been reached"}}