Insert/stream error

I spent a lot of time on this error but I could not solve it:
ERROR: Fix insert/stream (id ins): unknown keyword or wrong keyword order (../fix_insert_stream.cpp:151)

This my code:

#region and insertion
group nve_group region reg
fix ins nve_group insert/stream seed 49979687 distributiontemplate pdd1 vol ${alphastart} 200 region inbox

I attached the script, I need also help in defining the possible errors in this code I want to create the model shown in the attached figure

This it the full execution from terminal:

LIGGGHTS (Version LIGGGHTS-PUBLIC 3.8.0, compiled 2021-06-01-21:10:52 by abdelmalek, git commit 3b38a7dbe22018f905d4c5f792ab5ce644ef594e)
Created orthogonal box = (-1e-05 -5.001e-05 -1e-08) to (0.0030001 0.0008 0.0030001)
2 by 1 by 1 MPI processor grid
Fix particledistribution/discrete (id pdd1): distribution based on mass%:
pts1: d=2.000000e-04 (max. bounding sphere) mass%=100.000000%
pts2: d=1.800000e-04 (max. bounding sphere) mass%=0.000000%
Fix particledistribution/discrete (id pdd1): distribution based on number%:
pts1: d=2.000000e-04 (max. bounding sphere) number%=100.000000%
pts2: d=1.800000e-04 (max. bounding sphere) number%=0.000000%
Fix particledistribution/discrete (id pdd2): distribution based on mass%:
pts1: d=2.000000e-04 (max. bounding sphere) mass%=0.000000%
pts2: d=1.800000e-04 (max. bounding sphere) mass%=100.000000%
Fix particledistribution/discrete (id pdd2): distribution based on number%:
pts1: d=2.000000e-04 (max. bounding sphere) number%=0.000000%
pts2: d=1.800000e-04 (max. bounding sphere) number%=100.000000%
0 atoms in group nve_group
ERROR: Fix insert/stream (id ins): unknown keyword or wrong keyword order (../fix_insert_stream.cpp:151)
--------------------------------------------------------------------------
Primary job terminated normally, but 1 process returned
a non-zero exit code. Per user-direction, the job has been aborted.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpirun detected that one or more processes exited with non-zero status, thus causing
the job to be terminated. The first process to do so was:

Process name: [[10790,1],1]
Exit code: 1
--------------------------------------------------------------------------

Bests