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-rw-r--r--plugins/mod_storage_sql.lua2
1 files changed, 1 insertions, 1 deletions
diff --git a/plugins/mod_storage_sql.lua b/plugins/mod_storage_sql.lua
index 872b5f49..859b43c9 100644
--- a/plugins/mod_storage_sql.lua
+++ b/plugins/mod_storage_sql.lua
@@ -496,7 +496,7 @@ local function create_table(engine) -- luacheck: ignore 431/engine
Column { name="with", type="TEXT", nullable=false }; -- related id
Column { name="type", type="TEXT", nullable=false };
Column { name="value", type="MEDIUMTEXT", nullable=false };
- Index { name="prosodyarchive_index", "host", "user", "store", "key" };
+ Index { name="prosodyarchive_index", unique = engine.params.driver ~= "MySQL", "host", "user", "store", "key" };
Index { name="prosodyarchive_with_when", "host", "user", "store", "with", "when" };
Index { name="prosodyarchive_when", "host", "user", "store", "when" };
};