[Cause]
The welding wire has already contacted the workpiece before executing the touch retraction arc.
[Countermeasure]
Check whether the torch is too close to the workpiece at the arc-start position. If it is too close, modify the teaching. This may occur if the wire stickout at the end of the preceding weld is too long. In that case, adjust the wire post-processing conditions of the preceding arc-end instruction so that the wire stickout at the end of welding is appropriate.