Prusa only complete Bed Mesh

[Schnitzelino]

Hello, i used your G-Code in Prusa Slicer.
It does the Bed Mesh, but the complete Bed not only the printing area... Whats the problem?

I used exactly this G-Code as you said:
BED_MESH_CALIBRATE PRINT_MIN={first_layer_print_min[0]},{first_layer_print_min[1]} PRINT_MAX={first_layer_print_max[0]},{first_layer_print_max[1]}