"echo: too long extrusion prevented" on TAZ 6

I’ve been trying to calibrate my FlexyDually extruder steps per mm, and when re-doing the steps to extrude another 100mm of filament, I get this message “echo: too long extrusion prevented” after entering G1 E100 F20 on Cura controler window. Now I cannot proceed with calibration.
Anyone know how I can fix that?