Help with Errors

[Team 3023]

Hey, we are new to programming and when we run the code, we get this error.

ERROR Unhandled exception: java.lang.RuntimeException: 
 Code: -1029. HAL: Resource already allocated at [edu.wpi.first.wpilibj.hal.PWMJNI.allocatePWMChannel(Native Method),
 edu.wpi.first.wpilibj.PWM.initPWM(PWM.java:117),
 edu.wpi.first.wpilibj.PWM.<init>(PWM.java:134),
 edu.wpi.first.wpilibj.SafePWM.<init>(SafePWM.java:35),
 edu.wpi.first.wpilibj.Talon.<init>(Talon.java:51),
 org.usfirst.frc.team3023.robot.DriveTrain.<init>(DriveTrain.java:10), 
 org.usfirst.frc.team3023.robot.Robot.robotInit(Robot.java:122), 
 edu.wpi.first.wpilibj.IterativeRobot.startCompetition(IterativeRobot.java:72), 
 edu.wpi.first.wpilibj.RobotBase.main(RobotBase.java:241)]

We are wondering if anyone has a solution to this