Error Start_print and PrusaSlicer

[Skippythekangoo]

Morning.

When I slice some stl files, I have this error :

G-code export to /tmp/.2658041.gcode failed due to invalid custom G-code sections:
start_gcode
Parsing error at line 2: Not a variable name
START_PRINT HOTEND={first_layer_temperature[initial_extruder]+extruder_temperature_offset[initial_extruder]} BED={first_layer_bed_temperature} RELATIVE_E_MODE={use_relative_e_distances} PROBE=true PROBE_AREA_START={first_layer_print_min[0]},{first_layer_print_min[1]} PROBE_AREA_END={first_layer_print_max[0]},{first_layer_print_max[1]}
                                                              ^
Please inspect the file /tmp/.2658041.gcode.tmp for error messages enclosed between
        !!!!! Failed to process the custom G-code template ...
and
        !!!!! End of an error report for the custom G-code template ...
for all macro processing errors.

I use Marlin 2 as gcode flavor.