Why does “lineage” retain the "e" when the suffix "-age" is added?

Question

"Lineage" (/ˈlɪn·i·ɪdʒ/) is equivalent to "line" + "-age". Other such nouns lose the "e" when this suffix is added:

Stem
+ Suffix
= Noun

Anecdote
+ Age
= Anecdotage

Cleave
+ Age
= Cleavage

Dose
+ Age
= Dosage

Store
+ Age
= Storage

Use
+ Age
= Usage

Why does "lineage" stray from this trend and retain the "e" after we add "-age"?

Old Brixtonian · Answer

According to Etymonline the Middle English word was linage ("line of descent; an ancestor"), which came from the Old French lignage.
"The word altered in spelling and pronunciation in early Modern English, apparently by some combined influence of line (n.) and lineal."
I wonder if there was further influence from 'linear' (from the French linéaire) and 'lineal' (from the Old French 'lineal'!)
Perhaps there was also an acknowledgement that a phoneme in the OF lignage had been elided in ME.

Why does “lineage” retain the "e" when the suffix "-age" is added?

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Stem	+ Suffix	= Noun
Anecdote	+ Age	= Anecdotage
Cleave	+ Age	= Cleavage
Dose	+ Age	= Dosage
Store	+ Age	= Storage
Use	+ Age	= Usage