Coordinate system and touch off

Hi a beginner question. So I setup my cnc and I want to do a first test run. I use freecad as CAD and CAM programm. In freecad I set my origin on one of the upper corners. Then I create the toolpath. But I get exceeding limit error in linuxcnc. My machine limits are x-10  to 2000, y-10 to 1000 and z0 to -150. So my procedure is I move the tip of the endmill to the corner of the workpiece. Which is lets say in machine coordinates at x100 y100 and z-20. Then I send g10 l2 p1 x0 y0 z0. My understanding was that this sets the coordinate system 1 to zero. Then I start my program which begins with

(Exported by FreeCAD)
(Post Processor: script_module)
(Output Time:2025-02-07 23:16:55.212221)
(begin preamble)
G17 G54 G40 G49 G80 G90
G21
(begin operation: Fixture)
(machine units: mm/min)
G54 
(finish operation: Fixture)
(begin operation: 6mm_Endmill001)
(machine units: mm/min)
(6mm_Endmill001) 
M5
M6 T2 
G43 H2 
M3 S2000 
(finish operation: 6mm_Endmill001)
(begin operation: Profile)
(machine units: mm/min)
(Profile) 
(Compensated Tool Path. Diameter: 6.0) 
G0 Z6.000 
G0 X56.121 Y56.121 
G0 Z4.000 
G1 X56.121 Y56.121 Z-5.000 F120.000 
G2 X57.000 Y54.000 Z-5.000 I-2.121 J-2.121 F120.000 
G1 X57.000 Y4.000 Z-5.000 F120.000 

 

But I get an error at G0 Z6.000 already. So what am I missing here? In machine coordinates I would still have the space to move 6mm up.