// Validate position limit only after all other operations
validate_positions_limit(deps.as_ref(), &receiver, true)?;
pub fn create_position(
    deps: DepsMut,
    env: Env,
    info: MessageInfo,
    receiver: Option<String>,
    lp_token: String,
    unlocking_duration: u64,
) -> Result<Response, ContractError> {
    let config = CONFIG.load(deps.storage)?;

    // Validate and get receiver early
    let receiver = if let Some(ref receiver) = receiver {
        let receiver = deps.api.addr_validate(receiver)?;
        ensure!(
            info.sender == config.pool_manager_addr || info.sender == receiver,
            ContractError::Unauthorized
        );
        receiver
    } else {
        info.sender.clone()
    };

    // Check position limit early to fail fast
    validate_positions_limit(deps.as_ref(), &receiver, true)?;

    // Rest of the function...
}
