Ignore blank values in COMBINEVALUES

Hello lovely people,

I have the following DAX returning in a column all the combination from the following table

L4 = 
CONCATENATEX( RELATEDTABLE(ALL_IB_FILTER), ALL_IB_FILTER[Solution],"|")

I would like to clean up the output since the formula also combines empty values and leaves the delimiter

My expected output : only show combine values when not empty ex 

Sol 1 | Sol 2 | Sol 4

Sol 3 | Sol 2 | Sol 5

Thank you very much

Quentin