solidity dynamisches Struct-Array

Wenn ich meinen Smart Contract solide entwickle, stoße ich auf ein Problem. Und unten ist mein Soliditätscode.

pragma solidity ^0.4.0;

contract RegisterContract{

event setNewUser(bytes32 name,address etherAddr, address contractAddr,uint now);
address owner;
struct User{
    bytes32 name;
    address etherAddr;
    address contractAddr;
}
User[] private users;

constructor() public{
    owner = msg.sender;
}
modifier checkOwner(){
    require(msg.sender == owner);
    _;
}
function getOwner() public view returns (address){
    return owner;
}
// for a new user create a contract 
function registerUser(bytes32 name,address etherAddr, address contractAddr) public checkOwner{
    User memory newUser;
    newUser.name = name;
    newUser.etherAddr = etherAddr;
    newUser.contractAddr = contractAddr;
    users.push(newUser);
    emit setNewUser(name,etherAddr,contractAddr,now);
}
// 
function setAddress(bytes32 name,address etherAddr, address contractAddr) public checkOwner{
    for(uint8 i=0;i<users.length;i++){
        if(users[i].name==name){
            users[i].etherAddr=etherAddr;
            users[i].contractAddr=contractAddr;
        }
    }
}
// when systems assess all user
function getUsers() public checkOwner view returns (bytes32[],address[],address[]) {
    bytes32[] memory names= new bytes32[](users.length);
    address[] memory etherAddr = new address[](users.length);
    address[] memory contractAddr = new address[](users.length);
    for(uint8 i=0;i<users.length;i++){
        names[i]= users[i].name;
        etherAddr[i] = users[i].etherAddr;
        contractAddr[i] = users[i].contractAddr;
    }
    return (names,etherAddr,contractAddr);
}
//for a user who import contract 
function getContractAddress(address etherAddr) public checkOwner view returns (bytes32,address) {
    for(uint8 i=0;i<users.length;i++){
        if(users[i].etherAddr==etherAddr){
            return (users[i].name,users[i].contractAddr);
        }
    }
}
}

Die Frage ist, wann ich registerUser aufrufen möchte und wenn ich mit web3.js registerContract.methods.registerUser(name,etheraddress,contractaddress) aufrufe . Es wird ein Fehler auf der Geth-Konsole ausgegeben. Der Fehler ist

Error: Transaction has been reverted by the EVM: { "blockHash": "0x45fe755c8c1f600108b55a12fa3bdf59dac0fe76d39883f23d15b2f9603d868d", "blockNumber": 22339, "contractAddress": null, "cumulativeGasUsed": 90000, "from": "0x5869c2317ce2df31cb1269d8028e9062ff470749", "gasUsed": 90000 , "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", "status": false, "to": "0xc249fa432a1c659e7aa4ad57e24e405215461afa", "transactionHash": "0xb52e0fabe160070597bd40192658b6f84779d52d4b295b39295d381eb0856f2d", "transactionIndex": 0, "events": {} }false, "to": "0xc249fa432a1c659e7aa4ad57e24e405215461afa", "transactionHash": "0xb52e0fabe160070597bd40192658b6f84779d52d4b295b39295d381eb0856f2d", "transactionIndexs": {0,} "event}false, "to": "0xc249fa432a1c659e7aa4ad57e24e405215461afa", "transactionHash": "0xb52e0fabe160070597bd40192658b6f84779d52d4b295b39295d381eb0856f2d", "transactionIndexs": {0,} "event}

Ist etwas falsch, wenn ich struct User und array push angesprochen habe? Oder gibt es Probleme, die mir zum Zeitpunkt der Entwicklung nicht bewusst waren?