cubicweb-file #3555224 data_sha1hex must be read only [validation pending]

[schema] data_sha1hex must be read only

prioritynormal
typebug
done in1.16.0
load0.200
load left0.000
closed by#d8d65f3423fc [schema] data_sha1hex is read only (closes #3555224)
patch[schema] data_sha1hex is read only (closes #3555224) [applied]