code": -32000, "message": "gas required exceeds allowance (20058647) - ethereum

Question

when i want to deploy this contract in REMIX IDE i get this error:
Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending?
Internal JSON-RPC error.
{
"code": -32000,
"message": "gas required exceeds allowance (20058647)"
}
this is my contract:
//SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.9.0;
import "#openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "#openzeppelin/contracts/access/Ownable.sol";
contract KINGs300 is ERC721Enumerable, Ownable {
using Strings for uint256;
string public baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.5 ether;
uint256 public maxSupply = 300;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI
)
ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
mint(msg.sender, 300);
}
function _baseURI() internal view override virtual returns (string memory) {
return baseURI;
}
function mint(address _to, uint256 _mintAmount) public payable {
uint256 supply = totalSupply();
require(_mintAmount > 0);
require(supply + _mintAmount <= maxSupply);
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(_to, supply + i);
}
}
function walletOfOwner(address _owner) public view returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory tokenIds = new uint256[](ownerTokenCount);
for (uint256 i; i < ownerTokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokenIds;
}
function tokenURI(uint256 tokenId) public view override virtual returns (string memory)
{
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI,tokenId.toString(),baseExtension))
: "";
}
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
}
i want to mint a collection that has 300 NFTs in it

Answer 1

You can't mint 300 NFTs at once because of gas Limit of blocks, check this link for the limit of ethereum
https://ethereum.org/en/developers/docs/gas/
Block limit of 30 million gas for ethereum.
Try minting less NFTs like 100 NFTs per transaction and you must send 3 tranasction for minting 300 NFTs.